{"title":"Maksutov-Cassegrains","description":"","products":[{"product_id":"questar-3-5-standard-magnesium-fluoride-coatings","title":"Questar 3.5\" Telescope Standard, Magnesium Fluoride Coatings","description":"\u003cp\u003eOptical theory says that a Questar should not be able to resolve lunar craterlets and rilles under 1.3 arc seconds across - yet there are countless Questar owners and Questar photos that prove optical theory wrong . . .\u003c\/p\u003e\n\u003cp\u003eIn 1950, Questar introduced the first truly portable, lightweight, 3.5\" astronomical telescope. Regarded as the finest personal telescope in the world, the 3.5\" Questar Standard Maksutov-Cassegrain was legendary for its resolution, flatness of field, and contrast. While today's 3.5\" Questar outwardly appears virtually identical to the 1950 original, natural evolution and new technologies have improved even its legendary performance. Today, as in 1950, Questar once again sets the highest standard for optical performance in a truly portable personal telescope, with integrated features that are unavailable with other telescopes.\u003cbr\u003e\u003cbr\u003eWhat is it about a Questar that makes it the best?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eHundreds of hours of painstaking, skilled effort and the finest materials available go into producing this optical and mechanical masterpiece. As a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eWhat are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar is a complete telescope in a seven pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach the tabletop tripod legs stored in a pocket in the door of the carry case, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003ePlug a Questar into a 110 volt 60 Hz household AC outlet and its built-in drive smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003eAn optional Powerguide III DC drive system and drive corrector will power the Questar drive motor for up to 50 hours from a single 9 volt transistor radio battery, freeing you forever from the need to stay near an AC outlet to observe the skies. Pushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with drive corrections at 1.4x and 10x the sidereal rate. Dual axis drive correction is possible by adding an optional declination motor. Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage, or the right kind of AC plug. The Powerguide III hand control stores neatly into a pocket in the door of the carrying case when not in use. With a Powerguide III, the Questar is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eHigh transmission\/low reflectivity magnesium fluoride coatings on both sides of the BK7 corrector lens are standard on a Questar. An additional option of broadband dielectric multicoatings to the corrector lens during manufacture (which also includes a change of mirror coatings from aluminum to silver) is also available. This option gives you 22% greater light transmission for deep space viewing, and higher lunar and planetary contrast. (Broadband coatings are not recommended if you live by the seaside, as the silver mirror coatings can be adversely affected by constant exposure to salt air.)\u003c\/p\u003e\n\u003cp\u003eA thermally stable Zerodur ceramic mirror is available as an option to the Questar's standard Pyrex mirror for situations involving large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. If you want the best small telescope in the world, Questar is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eAluminized and overcoated pyrex mirror\u003c\/li\u003e\n\u003cli\u003eMagnesium fluoride coated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221634068553,"sku":"Q3","price":5595.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3633_1.jpg?v=1662966706"},{"product_id":"questar-3-5-standard-broadband-coatings","title":"Questar 3.5\" Telescope Standard, Broadband Coatings","description":"\u003cp\u003eIn 1950, Questar introduced the first truly portable, lightweight, 3.5\" astronomical telescope. Regarded as the finest personal telescope in the world, the 3.5\" Questar Standard Maksutov-Cassegrain was legendary for its resolution, flatness of field, and contrast. While today's 3.5\" Questar outwardly appears virtually identical to the 1950 original, natural evolution and new technologies have improved even its legendary performance. Today, as in 1950, Questar once again sets the highest standard for optical performance in a truly portable personal telescope, with integrated features that are unavailable with other telescopes.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that makes it the best?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eHundreds of hours of painstaking, skilled effort and the finest materials available go into producing this optical and mechanical masterpiece. As a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eWhat are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar is a complete telescope in a seven pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach the tabletop tripod legs stored in a pocket in the door of the carry case, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003ePlug a Questar into a 110 volt 60 Hz household AC outlet and its built-in drive smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003eAn optional Powerguide III DC drive system and drive corrector will power the Questar drive motor for up to 50 hours from a single 9 volt transistor radio battery, freeing you forever from the need to stay near an AC outlet to observe the skies. Pushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with drive corrections at 1.4x and 10x the sidereal rate. Dual axis drive correction is possible by adding an optional declination motor. Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage, or the right kind of AC plug. The Powerguide III hand control stores neatly into a pocket in the door of the carrying case when not in use. With a Powerguide III, the Questar is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar with standard optical coatings (Questar model #Q3), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eA thermally stable Zerodur ceramic mirror is available as an option to the Questar's standard Pyrex mirror for situations involving large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. If you want the best small telescope in the world, Questar is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated pyrex mirror, broadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (five years on coatings, two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221634134089,"sku":"Q3B","price":5995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3637_1.jpg?v=1662966710"},{"product_id":"questar-3-5-standard-broadband-coatings-zerodur-mirror","title":"Questar 3.5\" Telescope Standard, Broadband Coatings, Zerodur Mirror","description":"\u003cp\u003eIn 1950, Questar introduced the first truly portable, lightweight, 3.5\" astronomical telescope. Regarded as the finest personal telescope in the world, the 3.5\" Questar Standard Maksutov-Cassegrain was legendary for its resolution, flatness of field, and contrast. While today's 3.5\" Questar outwardly appears virtually identical to the 1950 original, natural evolution and new technologies have improved even its legendary performance. Today, as in 1950, Questar once again sets the highest standard for optical performance in a truly portable personal telescope, with integrated features that are unavailable with other telescopes.\u003cbr\u003e\u003cbr\u003eWhat is it about a Questar that makes it the best?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eHundreds of hours of painstaking, skilled effort and the finest materials available go into producing this optical and mechanical masterpiece. As a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eWhat are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar is a complete telescope in a seven pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach the tabletop tripod legs stored in a pocket in the door of the carry case, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003ePlug a Questar into a 110 volt 60 Hz household AC outlet and its built-in drive smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003eAn optional Powerguide III DC drive system and drive corrector will power the Questar drive motor for up to 50 hours from a single 9 volt transistor radio battery, freeing you forever from the need to stay near an AC outlet to observe the skies. Pushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with drive corrections at 1.4x and 10x the sidereal rate. Dual axis drive correction is possible by adding an optional declination motor. Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage, or the right kind of AC plug. The Powerguide III hand control stores neatly into a pocket in the door of the carrying case when not in use. With a Powerguide III, the Questar is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat, for an additional improvement in light transmission of 10% per surface. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar with standard optical coatings (Questar model #Q3), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eThe scope's thermally-stable Zerodur ceramic mirror eliminates the minor need to refocus the scope as it cools to ambient temperature in situations involving large temperature swings. With a conventional Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when the scope is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, the Zerodur mirror in this scope eliminates even the need for minor refocusing, should this be a concern or an inconvenience.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. If you want the best small telescope in the world, Questar is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated Zerodur glass ceramic mirror\u003c\/li\u003e\n\u003cli\u003eBroadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221634723913,"sku":"Q3BZ","price":6395.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3755_1.jpg?v=1662966725"},{"product_id":"questar-3-5-duplex-broadband-coatings-zerodur-mirror","title":"Questar 3.5\" Telescope Duplex, Broadband Coatings, Zerodur Mirror","description":"\u003cp\u003eFor the serious amateur astronomer who would like to take Questar quality into the field for nature studies and photography in all climate extremes, as well as for unsurpassed star-gazing, the 3.5\" Questar Duplex with broadband optical coatings and a Zerodur mirror is ideal. A simple turn of a knurled knob under the scope separates the optical tube of a specially modified 3.5\" Questar from its fork mount. It converts the astronomical telescope into a spotting scope and telephoto lens for terrestrial use, ready to be mounted in seconds on any sturdy camera tripod.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBecause of its high magnification and its ability to focus as close as 8', something virtually no other spotting scope can do, a broadband-coated Duplex makes a superb long distance microscope for close-ups of subjects too small or too dangerous to examine face to face. At its standard 54x magnification, a subject 10 feet away appears the same size as it would if you could get your eye within a mere 2.2\" of it, with a field only 1.8\" wide filling your eyepiece! Imagine the close-up views you will get of hornets' nests, spiders lurking in dew-soaked webs, gape-mouthed baby birds being fed in nearby nests, and more!\u003c\/p\u003e\n\u003cp\u003eThe broadband-coated Questar Duplex gives you unexcelled optics and portability for nature studies and high power\/high contrast photography by day, plus an ultra-compact telescope that opens a universe of viewing pleasure by night. In terms of operational flexibility and visual quality, the Questar Duplex is the optical equivalent of a Swiss Army Knife made by Rolls-Royce.\u003c\/p\u003e\n\u003cp\u003eAt a distance of one mile, optical theory prescribes a resolution of 1\/3rd of an inch for the 3.5\" aperture Questar - but terrestrially this 3.5\" Questar, under good seeing conditions, can routinely resolve much thinner bicycle spokes at one mile, and leaf stems at two miles! As a review in Audubon magazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.) And optical theory says that a Questar should not be able to resolve lunar craterlets and rilles under 1.3 arc seconds across - yet there are countless Questar owners and Questar photos that prove optical theory wrong.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it exceed the theoretical limits on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces a guaranteed total system performance of 1\/8th wave or better at the eyepiece. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that's indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, those other manufacturers do not specify whether their performance is for individual components or for their system as a whole. In either case, it's a far cry from the 1\/8th wave total system accuracy at the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 3.5\" Questar can often outresolve an 8\" Schmidt-Cassegrain on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere that all telescopes must look through, day and night. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The image-blurring effect of these microcells is largely invisible as long as the bundle of light entering the telescope is smaller than the 4\" diameter of the cells.\u003c\/p\u003e\n\u003cp\u003eIt was for just this reason that an aperture of 3.5\" was chosen for the Questar. In average to mediocre seeing conditions, a 3.5\" Questar will see through individual 4\" microcells undisturbed, showing more detail than a larger scope that has to put up with the blurring of multiple turbulent cells.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Maksutov scatters less light than a Schmidt-Cassegrain or reflector's larger secondary. The secondary of an 8\" Schmidt can be a full 3.45\" in diameter, for example - a light-scattering obstruction almost as large as the entire 3.5\" Questar aperture! In addition, a Questar's central baffle tube is not merely black plastic or metal painted black to reduce reflections, as with lesser scopes. The Questar central baffle tube actually contains 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast terrestrial, planetary, and lunar details that a larger catadioptric scope or reflector can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 3.5\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a Schmidt's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eBut Questar's quality does not stop with optical performance. What are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar Duplex is a complete telescope in an eight pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach its tabletop tripod legs, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003ePlug a Questar Duplex into a 110 volt 60 Hz household AC outlet and its built-in motor drive smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Duplex will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters for the optical tube and finder provide complete protection against the Sun's fierce radiation for your eye and telescope.\u003c\/p\u003e\n\u003cp\u003eAn optional Powerguide III DC drive system and drive corrector will power the Questar Duplex drive motor for up to 50 hours from a single 9 volt transistor radio battery, freeing you forever from the need to stay near an AC outlet to observe the skies. Pushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with drive corrections at 1.4x and 10x the sidereal rate. Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage. With a Powerguide III, the Questar is truly a universal use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar Duplex includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat, for an additional improvement in light transmission of 10% per surface. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and low light terrestrial observing and for viewing faint deep space objects at night.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar Duplex with standard optical coatings (Questar model #QD3), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eThe scope's thermally-stable Zerodur ceramic mirror eliminates the minor need to refocus the scope as it cools to ambient temperature in situations involving large temperature swings. With a conventional Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when the scope is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, the Zerodur mirror in this scope eliminates even the need for minor refocusing when the optical tube is taken outside in cold temperatures for a quick terrestrial photography session, or the complete scope is taken out during a winter's night for some star-gazing, should this be a concern or an inconvenience.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, total freedom from temperature-related focusing issues, with an image clarity and contrast in a class all its own, plus the multifunction ability to convert in seconds from an astronomical telescope to a terrestrial spotting scope and telephoto lens - this Questar Duplex with broadband coatings and a Zerodur mirror is not only the \"Rolls-Royce\" of telescopes, it is the \"Swiss Army Knife\" of telescopes. If you want the best and most flexible small telescope in the world, this Questar Duplex is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated Zerodur glass ceramic mirror\u003c\/li\u003e\n\u003cli\u003eBroadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eQuick disconnect optical tube with built-in photo tripod adapter for terrestrial use\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221637312585,"sku":"QDBZ","price":6775.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3936_1.jpg?v=1662966814"},{"product_id":"questar-3-5-duplex-magnesium-fluoride-coatings","title":"Questar 3.5\" Telescope Duplex, Magnesium Fluoride Coatings","description":"\u003cp\u003eFor the serious amateur astronomer who would like to take Questar quality into the field for nature studies and photography, as well as for unsurpassed star-gazing, the 3.5\" Questar Duplex is ideal. A simple turn of a knurled knob under the scope separates the optical tube of a specially modified 3.5\" Questar from its fork mount. It converts the astronomical telescope into a spotting scope and telephoto lens for terrestrial use, ready to be mounted in seconds on any sturdy camera tripod.\u003c\/p\u003e\n\u003cp\u003eBecause of its high magnification and its ability to focus as close as 8', something virtually no other spotting scope can do, a Duplex makes a superb long distance microscope for close-ups of subjects too small or too dangerous to examine face to face. At its standard 54x magnification, a subject 10 feet away appears the same size as it would if you could get your eye within a mere 2.2\" of it, with a field only 1.8\" wide filling your eyepiece! Imagine the close-up views you will get of hornets' nests, spiders lurking in dew-soaked webs, gape-mouthed baby birds being fed in nearby nests, and more!\u003c\/p\u003e\n\u003cp\u003eThe Questar Duplex gives you unexcelled optics and portability for nature studies and high power photography by day, plus an ultra-compact telescope that opens a universe of viewing pleasure by night. In terms of operational flexibility and visual quality, the Questar Duplex is the optical equivalent of a Swiss Army Knife made by Rolls-Royce.\u003c\/p\u003e\n\u003cp\u003eAt a distance of one mile, optical theory prescribes a resolution of 1\/3rd of an inch for the 3.5\" aperture Questar - but terrestrially this 3.5\" Questar, under good seeing conditions, can routinely resolve much thinner bicycle spokes at one mile, and leaf stems at two miles! As a review in Audubon magazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.) And optical theory says that a Questar should not be able to resolve lunar craterlets and rilles under 1.3 arc seconds across - yet there are countless Questar owners and Questar photos that prove optical theory wrong.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it exceed the theoretical limits on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces a guaranteed total system performance of 1\/8th wave or better at the eyepiece. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that's indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, those other manufacturers do not specify whether their performance is for individual components or for their system as a whole. In either case, it's a far cry from the 1\/8th wave total system accuracy at the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 3.5\" Questar can often outresolve an 8\" Schmidt-Cassegrain on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere that all telescopes must look through, day and night. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The image-blurring effect of these microcells is largely invisible as long as the bundle of light entering the telescope is smaller than the 4\" diameter of the cells.\u003c\/p\u003e\n\u003cp\u003eIt was for just this reason that an aperture of 3.5\" was chosen for the Questar. In average to mediocre seeing conditions, a 3.5\" Questar will see through individual 4\" microcells undisturbed, showing more detail than a larger scope that has to put up with the blurring of multiple turbulent cells.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Maksutov scatters less light than a Schmidt-Cassegrain or reflector's larger secondary. The secondary of an 8\" Schmidt can be a full 3.45\" in diameter, for example - a light-scattering obstruction almost as large as the entire 3.5\" Questar aperture! In addition, a Questar's central baffle tube is not merely black plastic or metal painted black to reduce reflections, as with lesser scopes. The Questar central baffle tube actually contains 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast terrestrial, planetary, and lunar details that a larger catadioptric scope or reflector can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 3.5\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a Schmidt's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eBut Questar's quality does not stop with optical performance. What are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar Duplex is a complete telescope in an eight pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach its tabletop tripod legs, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003ePlug a Questar Duplex into a 110 volt 60 Hz household AC outlet and its built-in motor drive smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Duplex will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters for the optical tube and finder provide complete protection against the Sun's fierce radiation for your eye and telescope.\u003c\/p\u003e\n\u003cp\u003eAn optional Powerguide III DC drive system and drive corrector will power the Questar Duplex drive motor for up to 50 hours from a single 9 volt transistor radio battery, freeing you forever from the need to stay near an AC outlet to observe the skies. Pushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with drive corrections at 1.4x and 10x the sidereal rate. Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage. With a Powerguide III, the Questar is truly a universal use anywhere\/use anytime telescope!\u003c\/p\u003e\n\u003cp\u003eHigh transmission magnesium fluoride coatings for high light transmission on both sides of the BK7 corrector lens are standard on a Questar Duplex. Having higher transmission broadband dielectric multicoatings added to the corrector lens during manufacture (which also includes a change of mirror coatings from aluminum to silver) is an option worth considering. This option gives you a total of 22% greater light transmission for deep space viewing and low light terrestrial observing, and higher lunar, planetary, and photographic contrast. (Broadband coatings are not recommended if you live by the seaside, as the silver mirror coatings can be adversely affected by constant exposure to salt air.)\u003c\/p\u003e\n\u003cp\u003eA thermally-stable Zerodur ceramic mirror is also available as a factory-installed option to replace this Questar Duplex's Pyrex mirror to reduce the need for minor refocusing during large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees Fahrenheit or more when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own, plus the multifunction ability to convert in seconds from an astronomical telescope to a terrestrial spotting scope and telephoto lens - this Questar Duplex is not only the \"Rolls-Royce\" of telescopes, it is the \"Swiss Army Knife\" of telescopes. If you want the best and most flexible small telescope in the world, the Questar Duplex is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eAluminized and overcoated pyrex mirror\u003c\/li\u003e\n\u003cli\u003eMagnesium fluoride coated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eQuick disconnect optical tube with built-in photo tripod adapter for terrestrial use\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221638066249,"sku":"QD","price":5975.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3980_1.jpg?v=1662966841"},{"product_id":"questar-3-5-duplex-broadband-coatings","title":"Questar 3.5\" Telescope Duplex, Broadband Coatings","description":"\u003cp\u003eFor the serious amateur astronomer who would like to take Questar quality into the field for nature studies and photography, as well as for unsurpassed star-gazing, the 3.5\" Questar Duplex with broadband optical coatings is ideal. A simple turn of a knurled knob under the scope separates the optical tube of a specially modified 3.5\" Questar from its fork mount. It converts the astronomical telescope into a spotting scope and telephoto lens for terrestrial use, ready to be mounted in seconds on any sturdy camera tripod.\u003c\/p\u003e\n\u003cp\u003eBecause of its high magnification and its ability to focus as close as 8', something virtually no other spotting scope can do, a broadband-coated Duplex makes a superb long distance microscope for close-ups of subjects too small or too dangerous to examine face to face. At its standard 54x magnification, a subject 10 feet away appears the same size as it would if you could get your eye within a mere 2.2\" of it, with a field only 1.8\" wide filling your eyepiece! Imagine the close-up views you will get of hornets' nests, spiders lurking in dew-soaked webs, gape-mouthed baby birds being fed in nearby nests, and more!\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe broadband-coated Questar Duplex gives you unexcelled optics and portability for nature studies and high power\/high contrast photography by day, plus an ultra-compact telescope that opens a universe of viewing pleasure by night. In terms of operational flexibility and visual quality, the Questar Duplex is the optical equivalent of a Swiss Army Knife made by Rolls-Royce.\u003c\/p\u003e\n\u003cp\u003eAt a distance of one mile, optical theory prescribes a resolution of 1\/3rd of an inch for the 3.5\" aperture Questar - but terrestrially this 3.5\" Questar, under good seeing conditions, can routinely resolve much thinner bicycle spokes at one mile, and leaf stems at two miles! As a review in \u003cem\u003eAudubon \u003c\/em\u003emagazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.) And optical theory says that a Questar should not be able to resolve lunar craterlets and rilles under 1.3 arc seconds across - yet there are countless Questar owners and Questar photos that prove optical theory wrong.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it exceed the theoretical limits on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces a guaranteed total system performance of 1\/8th wave or better \u003cem\u003eat the eyepiece. \u003c\/em\u003eThat's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that's indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, those other manufacturers do not specify whether their performance is for individual components or for their system as a whole. In either case, it's a far cry from the 1\/8th wave total system accuracy \u003cem\u003eat the eyepiece \u003c\/em\u003eof a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 3.5\" Questar can often outresolve an 8\" Schmidt-Cassegrain on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere that all telescopes must look through, day and night. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The image-blurring effect of these microcells is largely invisible as long as the bundle of light entering the telescope is smaller than the 4\" diameter of the cells.\u003c\/p\u003e\n\u003cp\u003eIt was for just this reason that an aperture of 3.5\" was chosen for the Questar. In average to mediocre seeing conditions, a 3.5\" Questar will see through individual 4\" microcells undisturbed, showing more detail than a larger scope that has to put up with the blurring of multiple turbulent cells.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Maksutov scatters less light than a Schmidt-Cassegrain or reflector's larger secondary. The secondary of an 8\" Schmidt can be a full 3.45\" in diameter, for example - a light-scattering obstruction almost as large as the entire 3.5\" Questar aperture! In addition, a Questar's central baffle tube is not merely black plastic or metal painted black to reduce reflections, as with lesser scopes. The Questar central baffle tube actually contains 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast terrestrial, planetary, and lunar details that a larger catadioptric scope or reflector can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 3.5\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a Schmidt's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eBut Questar's quality does not stop with optical performance. What are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar Duplex is a complete telescope in an eight pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach its tabletop tripod legs, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003ePlug a Questar Duplex into a 110 volt 60 Hz household AC outlet and its built-in motor drive smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Duplex will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters for the optical tube \u003cem\u003eand \u003c\/em\u003efinder provide complete protection against the Sun's fierce radiation for your eye and telescope.\u003c\/p\u003e\n\u003cp\u003eAn optional Powerguide II DC drive system and drive corrector will power the Questar Duplex drive motor for up to 50 hours from a single 9 volt transistor radio battery, freeing you forever from the need to stay near an AC outlet to observe the skies. Pushbuttons on the quartz-controlled Powerguide II hand control allow single axis guided astrophotography with drive corrections at 1.4x and 10x the sidereal rate. Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage. With a Powerguide II, the Questar is truly a universal use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar Duplex includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects or terrestrial objects in the low light of early morning or twilight.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar Duplex with standard optical coatings (Questar model #QD3), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eA thermally stable Zerodur ceramic mirror is available as an option to the Questar's standard Pyrex mirror for situations involving large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own, plus the multifunction ability to convert in seconds from an astronomical telescope to a terrestrial spotting scope and telephoto lens - this Questar Duplex is not only the \"Rolls-Royce\" of telescopes, it is the \"Swiss Army Knife\" of telescopes. If you want the best and most flexible small telescope in the world, the Questar Duplex is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\n\u003cp\u003e10 years\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated pyrex mirror\u003c\/li\u003e\n\u003cli\u003eBroadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eQuick disconnect optical tube with built-in photo tripod adapter for terrestrial use\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (five years on coatings and two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221638099017,"sku":"QDB","price":6375.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3984_1.jpg?v=1662966842"},{"product_id":"questar-7-astro-maksutov-cassegrain","title":"Questar 7\" Astro Maksutov-Cassegrain","description":"\u003cp\u003eObserve through a Questar Seven Astro, and you'll see detail and clarity in the skies that you have never seen through a lesser scope, or even through many larger scopes. I have compared my own Questar Seven to a 14\" Schmidt-Cassegrain on deep space objects such as the Sombrero galaxy, the Saturn Nebula, and Omega Centauri. While the 14\" scope was brighter on the fainter objects, the superior contrast and resolution of the Questar Seven was easily visible . . . even to the owner of the 14\" scope. The Crêpe Ring and Encke's Division in the rings of Saturn are routine with a Seven in good seeing, as are myriad whorls and festoons in Jupiter's belts and hundreds of sub-kilometer craters on the lunar surface.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it outperform larger scopes on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces guaranteed total system performance at the Cassegrain focus of 1\/8th wave or better. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that is indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, they do not specify whether that is for individual components or the system as a whole. In either case, it's a far cry from the 1\/8th wave \u003cem\u003etotal system accuracy \u003c\/em\u003eat the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 7\" Questar can routinely outresolve a 14\" Schmidt-Cassegrain (or virtually any other larger aperture catadioptric or reflector scope) on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere all telescopes must look through. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The larger the aperture of the scope, the greater the image-blurring effect of these microcells, as the larger scopes simply have to look through more of these turbulent cells than a smaller scope.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Seven Maksutov (only 1.87\" in diameter) scatters far less light than a 14\" Schmidt-Cassegrain's much larger 4.5\" secondary. The same holds true with any other larger reflector or catadioptric telescope you care to name. They all have larger light-scattering secondary or diagonal mirror obstructions than a 7\" Questar Astro. In addition, a Questar's central baffle tube is not merely black plastic or painted black to reduce reflections, as with lesser scopes, but is a centerless ground stainless steel tube, anodized matte black and containing a wire helix with 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast planetary and lunar details that a larger scope can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 7\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a larger scope's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eThe Questar Astro is precision-fabricated of lightened aluminum and titanium components, black and blue anodized for long life. It has a 1\" diameter knurled anodized aluminum focusing knob on the rear cell. The knob focuses the scope by turning a spring-loaded 32-pitch stainless steel focus rod that acts directly on the mirror thimble to move the primary mirror within the optical tube. A precision linear rotor bearing, integrated with the mirror mounting, is matched to central tube thimble to minimize mirror shift when focusing.\u003c\/p\u003e\n\u003cp\u003eThe Seven Astro uses a 7\" diameter meniscus corrector lens of Grade A BK7 optical glass, with magnesium fluoride anti-reflection coatings for high light transmission and minimal reflected light loss. The 7.6\" diameter primary mirror is Pyrex, aluminized, with a silicon monoxide (quartz) overcoating for long life.\u003c\/p\u003e\n\u003cp\u003eThe Questar Astro comes with a 2\" mirror star diagonal (with a 1.25\" eyepiece adapter for Questar Brandon eyepieces) that threads onto the rear cell. A swivel coupling allows the eyepiece\/diagonal combination to be tilted from side to side to the most comfortable observing position. A 1.25\" Questar Brandon eyepiece is supplied with the scope to get you started observing. It provides a magnification of 100x and a 0.53° field of view that's a little larger in diameter than the full Moon. A dust cap and thread-on lens shade are standard, as is a hard carrying case. The Questar Seven Astro optical tube uses the well-known TeleVue Starbeam red dot unity-power illuminated finder that makes pointing a telescope as easy as pointing your finger.\u003c\/p\u003e\n\u003cp\u003eThe Questar Astro weighs 19 pounds (with diagonal and eyepiece in place, 21 pounds if you add the thread-on dew shield). It measures 17.6\" long (21.9\" with the star diagonal in place). The low profile mounting adapter block on the underside of the Astro has both 1\/4\"-20 and 3\/8\"-16 mounting holes to allow to be installed on the Questar Equatorial Fork Mount (our part #20004) and Questar Large Astro Pier (our part #29338) for astronomical use. It is well-balanced and relatively light, allowing it to be mounted on any suitably sturdy tripod for terrestrial operation. It can also be adapted to your own equatorial mount with minimal effort.\u003c\/p\u003e\n\u003cp\u003eA useful upgrade to consider would be to substitute a broadband coatings package on the optics in lieu of the standard magnesium fluoride coatings. This optional dielectric multicoatings package includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eA thermally stable Zerodur ceramic mirror is also available as an option in place of the standard Pyrex mirror. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates this need for refocusing. This option is well worth considering due to the large thermal mass of the 7\" mirror and its consequently longer cool-down time than a smaller scope. I have both broadband coatings and a Zerodur mirror on my Questar Seven and can recommend them without reservation.\u003c\/p\u003e\n\u003cp\u003eThe Questar Seven Astro comes in a high impact ABS plastic sealed carrying case. A basic 35mm camera coupling set is also included (needs a Questar T-ring to connect to your camera).\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. For those individuals who appreciate the very finest that life has to offer, a Questar Seven Astro will prove to be an absolutely eye-opening revelation.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eVery Good\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/13.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e17 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e362x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e19 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.65 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221638131785,"sku":"Q7A","price":11895.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3985_1.jpg?v=1662966844"},{"product_id":"questar-3-5-standard-magnesium-fluoride-coatings-factory-installed-powerguide-iii","title":"Questar 3.5\" Telescope Standard, Magnesium Fluoride Coatings, Factory-Installed Powerguide III","description":"\u003cp\u003eWith the factory-installed addition of the normally-optional battery-operated Powerguide III drive system, the standard Questar 3.5\" Maksutov-Cassegrain becomes a world traveler . . .\u003c\/p\u003e\n\u003cp\u003eIn 1950, Questar introduced the first truly portable, lightweight, 3.5\" astronomical telescope. Regarded as the finest personal telescope in the world, the 3.5\" Questar Standard Maksutov-Cassegrain was legendary for its resolution, flatness of field, and contrast. While today's 3.5\" Questar outwardly appears virtually identical to the 1950 original, natural evolution and new technologies have improved even its legendary performance. Today, as in 1950, Questar once again sets the highest standard for optical performance in a truly portable personal telescope, with integrated features that are unavailable with other telescopes.\u003cbr\u003e\u003cbr\u003eWhat is it about a Questar that makes it the best?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eHundreds of hours of painstaking, skilled effort and the finest materials available go into producing this optical and mechanical masterpiece. As a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eWhat are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar is a complete telescope in a seven pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach the tabletop tripod legs stored in a pocket in the door of the carry case, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003eThe normally-optional Powerguide III DC drive system\/drive corrector that is factory-installed into this Questar eliminates the need to stay near an AC power outlet to operate the scope's motor. The Powerguide III replaces the standard Questar's 110 volt AC drive with a DC servo quartz drive that powers the scope's drive motor for up to 50 hours from a single 9 volt transistor radio battery. This frees you forever from the need to stay near an AC outlet to observe the skies. The Powerguide III will smoothly track the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003ePushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with 1.4x and 10x sidereal guiding rates in right ascension (dual axis with an optional declination motor). Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage, or having the right kind of AC adapter. The Powerguide III hand control stores neatly into a pocket in the door of the carrying case when not in use. With the factory-installed Powerguide III, the Questar is truly a use-anywhere\/anytime telescope!\u003c\/p\u003e\n\u003cp\u003eHigh transmission\/low reflectivity magnesium fluoride coatings on both sides of the scope's BK7 corrector lens are standard on this Questar. The option of replacing the magnesium fluoride coatings on the corrector lens with broadband dielectric multicoatings during manufacture (which also includes a change of mirror coatings from aluminum to silver) is also available. This option gives you a full 22% greater light transmission for deep space viewing, and higher lunar and planetary contrast. (Broadband coatings are not recommended if you live by the seaside, as the silver mirror coatings can be adversely affected by constant exposure to salt air.)\u003c\/p\u003e\n\u003cp\u003eA thermally stable Zerodur ceramic mirror is also available as an option in place of the Questar's standard Pyrex mirror for situations involving large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. If you want the best small telescope in the world, Questar is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eAluminized and overcoated pyrex mirror\u003c\/li\u003e\n\u003cli\u003eMagnesium fluoride coated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221646749769,"sku":"Q3PG","price":6644.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5507_1.jpg?v=1662967119"},{"product_id":"questar-3-5-standard-broadband-coatings-factory-installed-powerguide-iii","title":"Questar 3.5\" Telescope Standard, Broadband Coatings, Factory Installed Powerguide III","description":"\u003cp\u003eIn 1950, Questar introduced the first truly portable, lightweight, 3.5\" astronomical telescope. Regarded as the finest personal telescope in the world, the 3.5\" Questar Standard Maksutov-Cassegrain was legendary for its resolution, flatness of field, and contrast. While today's 3.5\" Questar outwardly appears virtually identical to the 1950 original, natural evolution and new technologies have improved even its legendary performance. Today, as in 1950, Questar once again sets the highest standard for optical performance in a truly portable personal telescope, with integrated features that are unavailable with other telescopes.\u003cbr\u003e\u003cbr\u003eWhat is it about a Questar that makes it the best?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eHundreds of hours of painstaking, skilled effort and the finest materials available go into producing this optical and mechanical masterpiece. As a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eWhat are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar is a complete telescope in a seven pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach the tabletop tripod legs stored in a pocket in the door of the carry case, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003eThe normally-optional Powerguide III DC drive system\/drive corrector that is factory-installed into this Questar eliminates the need to stay near an AC power outlet to operate the scope's motor. The Powerguide III replaces the standard Questar's 110 volt AC drive with a DC servo quartz drive that powers the scope's drive motor for up to 50 hours from a single 9 volt transistor radio battery. This frees you forever from the need to stay near an AC outlet to observe the skies. The Powerguide III will smoothly track the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003ePushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with 1.4x and 10x sidereal guiding rates in right ascension (dual axis with an optional declination motor). Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage, or having the right kind of AC adapter. The Powerguide III hand control stores neatly into a pocket in the door of the carrying case when not in use. With the factory-installed Powerguide III, the Questar is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar with standard optical coatings (Questar model #Q3), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eA thermally-stable Zerodur ceramic mirror is available as an option to the Questar's standard Pyrex mirror for situations involving large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. If you want the best small telescope in the world, Questar is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated pyrex mirror, broadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (five years on coatings, two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221646815305,"sku":"Q3BPG","price":6644.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5508_1.jpg?v=1662967121"},{"product_id":"questar-3-5-standard-broadband-coatings-zerodur-mirror-factory-installed-powerguide-iii","title":"Questar 3.5\" Telescope Standard, Broadband Coatings, Zerodur Mirror, Factory-Installed Powerguide III","description":"\u003cp\u003eThere can be only one best small telescope in the world. This world-class broadband-coated\/Zerodur mirror Questar 3.5\" Maksutov-Cassegrain with its factory-installed battery-operated Powerguide III drive system is that scope . . .\u003c\/p\u003e\n\u003cp\u003eIn 1950, Questar introduced the first truly portable, lightweight, 3.5\" astronomical telescope. Regarded as the finest personal telescope in the world, the 3.5\" Questar Standard Maksutov-Cassegrain was legendary for its resolution, flatness of field, and contrast. While today's 3.5\" Questar outwardly appears virtually identical to the 1950 original, natural evolution and new technologies have improved even its legendary performance. Today, as in 1950, Questar once again sets the highest standard for optical performance in a truly portable personal telescope, with integrated features that are unavailable with other telescopes.\u003cbr\u003e \u003cbr\u003e What is it about a Questar that makes it the best?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eHundreds of hours of painstaking, skilled effort and the finest materials available go into producing this optical and mechanical masterpiece. As a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eWhat are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar is a complete telescope in a seven pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach the tabletop tripod legs stored in a pocket in the door of the carry case, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003eThe normally-optional Powerguide IIII DC drive system\/drive corrector that is factory-installed into this Questar eliminates the need to stay near an AC power outlet to operate the scope's motor. The Powerguide IIII replaces the standard Questar's 110 volt AC drive with a DC servo quartz drive that powers the scope's drive motor for up to 50 hours from a single 9 volt transistor radio battery. This frees you forever from the need to stay near an AC outlet to observe the skies. The Powerguide IIII will smoothly track the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003ePushbuttons on the quartz-controlled Powerguide IIII hand control allow single axis guided astrophotography with 1.4x and 10x sidereal guiding rates in right ascension (dual axis with an optional declination motor). Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar anywhere in the world without having to worry about finding the proper power frequency or voltage, or having the right kind of AC adapter. The Powerguide IIII hand control stores neatly into a pocket in the door of the carrying case when not in use. With the factory-installed Powerguide IIII, the Questar is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This comAVpares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar with standard optical coatings (Questar model #Q3), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eA thermally-stable Zerodur ceramic mirror is available as an option to the Questar's standard Pyrex mirror for situations involving large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. If you want the best small telescope in the world, Questar is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated Zerodur glass ceramic mirror\u003c\/li\u003e\n\u003cli\u003eBroadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221646848073,"sku":"Q3BZPG","price":7044.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5509_1.jpg?v=1662967123"},{"product_id":"questar-3-5-duplex-magnesium-fluoride-coatings-factory-installed-powerguide-iii","title":"Questar 3.5\" Telescope Duplex, Magnesium Fluoride Coatings, Factory Installed Powerguide III","description":"\u003cp\u003eFor the serious amateur astronomer who would like to take Questar quality into the field for nature studies and photography, as well as for unsurpassed star-gazing and astronomical photography far from any AC power supply, the 3.5\" Questar Duplex with its cordless Powerguide III DC-powered drive is ideal. You can use this superlative scope anywhere in the world without worrying about finding the right kind of AC power to operate its motor drive. In addition, a simple turn of a knurled knob under the scope separates the optical tube of this specially modified 3.5\" Questar from its fork mount. It converts the astronomical telescope into a spotting scope and telephoto lens for terrestrial use, ready to be mounted in seconds on any sturdy camera tripod.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBecause of its high magnification and its ability to focus as close as 8', something virtually no other spotting scope can do, this Duplex makes a superb long distance microscope for close-ups of subjects too small or too dangerous to examine face to face. At its standard 54x magnification, a subject 10 feet away appears the same size as it would if you could get your eye within a mere 2.2\" of it, with a field only 1.8\" wide filling your eyepiece! Imagine the close-up views you will get of hornets' nests, spiders lurking in dew-soaked webs, gape-mouthed baby birds being fed in nearby nests, and more!\u003c\/p\u003e\n\u003cp\u003eThe Questar Duplex gives you unexcelled optics and portability for nature studies and high power photography by day, plus an ultra-compact telescope that opens a universe of viewing pleasure by night. In terms of operational flexibility and visual quality, the Questar Duplex is the optical equivalent of a Swiss Army Knife made by Rolls-Royce.\u003c\/p\u003e\n\u003cp\u003eAt a distance of one mile, optical theory prescribes a resolution of 1\/3rd of an inch for the 3.5\" aperture Questar - but terrestrially this 3.5\" Questar, under good seeing conditions, can routinely resolve much thinner bicycle spokes at one mile, and leaf stems at two miles! As a review in Audubon magazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.) And optical theory says that a Questar should not be able to resolve lunar craterlets and rilles under 1.3 arc seconds across - yet there are countless Questar owners and Questar photos that prove optical theory wrong.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it exceed the theoretical limits on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces a guaranteed total system performance of 1\/8th wave or better at the eyepiece. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that's indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, those other manufacturers do not specify whether their performance is for individual components or for their system as a whole. In either case, it's a far cry from the 1\/8th wave total system accuracy at the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 3.5\" Questar can often outresolve an 8\" Schmidt-Cassegrain on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere that all telescopes must look through, day and night. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The image-blurring effect of these microcells is largely invisible as long as the bundle of light entering the telescope is smaller than the 4\" diameter of the cells.\u003c\/p\u003e\n\u003cp\u003eIt was for just this reason that an aperture of 3.5\" was chosen for the Questar. In average to mediocre seeing conditions, a 3.5\" Questar will see through individual 4\" microcells undisturbed, showing more detail than a larger scope that has to put up with the blurring of multiple turbulent cells.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Maksutov scatters less light than a Schmidt-Cassegrain or reflector's larger secondary. The secondary of an 8\" Schmidt can be a full 3.45\" in diameter, for example - a light-scattering obstruction almost as large as the entire 3.5\" Questar aperture! In addition, a Questar's central baffle tube is not merely black plastic or metal painted black to reduce reflections, as with lesser scopes. The Questar central baffle tube actually contains 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast terrestrial, planetary, and lunar details that a larger catadioptric scope or reflector can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 3.5\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a Schmidt's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eBut Questar's quality does not stop with optical performance. What are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar Duplex is a complete telescope in an eight pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach its tabletop tripod legs, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003eA Questar Powerguide III DC drive system\/drive corrector is factory-installed into this Questar Duplex. It replaces the AC motor and 110V power requirement of the standard Duplex. The Powerguide III has a DC servo quartz drive that powers the scope's drive motor for up to 50 hours from a single 9 volt transistor radio battery. This frees you forever from the need to stay near an AC outlet to observe the skies. The Powerguide III smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003ePushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with 1.4x and 10x sidereal guiding rates in right ascension (dual axis with an optional declination motor). Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar Duplex anywhere in the world without having to worry about finding the proper power frequency or voltage, or having the right kind of AC adapter. With the factory-installed Powerguide III, the Questar Duplex is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eHigh transmission magnesium fluoride coatings for high light transmission on both sides of the BK7 corrector lens are standard on a Questar Duplex. Having higher transmission broadband dielectric multicoatings added to the corrector lens during manufacture (which also includes a change of mirror coatings from aluminum to silver) is an option worth considering. This option gives you a total of 22% greater light transmission for deep space viewing and low light terrestrial observing, and higher lunar, planetary, and photographic contrast. (Broadband coatings are not recommended if you live by the seaside, as the silver mirror coatings can be adversely affected by constant exposure to salt air.)\u003c\/p\u003e\n\u003cp\u003eA thermally-stable Zerodur ceramic mirror is also available as a factory-installed option to replace this Questar Duplex's Pyrex mirror to reduce the need for minor refocusing during large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees Fahrenheit or more when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own, plus the multifunction ability to convert in seconds from an astronomical telescope to a terrestrial spotting scope and telephoto lens - this DC-powered Questar Duplex is not only the \"Rolls-Royce\" of telescopes, it is the \"Swiss Army Knife\" of telescopes. If you want the best and most flexible small telescope in the world, the Questar Duplex is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eAluminized and overcoated pyrex mirror\u003c\/li\u003e\n\u003cli\u003eMagnesium fluoride coated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eQuick disconnect optical tube with built-in photo tripod adapter for terrestrial use\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221646913609,"sku":"QDPG","price":6624.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5510_1.jpg?v=1662967125"},{"product_id":"questar-3-5-duplex-broadband-coatings-factory-installed-powerguide-iii","title":"Questar 3.5\" Telescope Duplex, Broadband Coatings, Factory Installed Powerguide III","description":"\u003cp\u003eFor the serious amateur astronomer who would like to take Questar quality into the field for nature studies and photography, as well as for unsurpassed star-gazing and astronomical photography far from any AC power supply, the 3.5\" Questar Duplex with broadband optical coatings and cordless Powerguide III DC-powered drive is ideal. You can use this superlative scope anywhere in the world without worrying about finding the right kind of AC power to operate its motor drive. In addition, a simple turn of a knurled knob under the scope separates the optical tube of this specially modified 3.5\" Questar from its fork mount. It converts the astronomical telescope into a spotting scope and telephoto lens for terrestrial use, ready to be mounted in seconds on any sturdy camera tripod.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBecause of its high magnification and its ability to focus as close as 8', something virtually no other spotting scope can do, a broadband-coated Duplex makes a superb long distance microscope for close-ups of subjects too small or too dangerous to examine face to face. At its standard 54x magnification, a subject 10 feet away appears the same size as it would if you could get your eye within a mere 2.2\" of it, with a field only 1.8\" wide filling your eyepiece! Imagine the close-up views you will get of hornets' nests, spiders lurking in dew-soaked webs, gape-mouthed baby birds being fed in nearby nests, and more!\u003c\/p\u003e\n\u003cp\u003eThe broadband-coated Questar Duplex gives you unexcelled optics and portability for nature studies and high power\/high contrast photography by day, plus an ultra-compact telescope that opens a universe of viewing pleasure by night. In terms of operational flexibility and visual quality, the Questar Duplex is the optical equivalent of a Swiss Army Knife made by Rolls-Royce.\u003c\/p\u003e\n\u003cp\u003eAt a distance of one mile, optical theory prescribes a resolution of 1\/3rd of an inch for the 3.5\" aperture Questar - but terrestrially this 3.5\" Questar, under good seeing conditions, can routinely resolve much thinner bicycle spokes at one mile, and leaf stems at two miles! As a review in Audubon magazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.) And optical theory says that a Questar should not be able to resolve lunar craterlets and rilles under 1.3 arc seconds across - yet there are countless Questar owners and Questar photos that prove optical theory wrong.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it exceed the theoretical limits on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces a guaranteed total system performance of 1\/8th wave or better at the eyepiece. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that's indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, those other manufacturers do not specify whether their performance is for individual components or for their system as a whole. In either case, it's a far cry from the 1\/8th wave total system accuracy at the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 3.5\" Questar can often outresolve an 8\" Schmidt-Cassegrain on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere that all telescopes must look through, day and night. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The image-blurring effect of these microcells is largely invisible as long as the bundle of light entering the telescope is smaller than the 4\" diameter of the cells.\u003c\/p\u003e\n\u003cp\u003eIt was for just this reason that an aperture of 3.5\" was chosen for the Questar. In average to mediocre seeing conditions, a 3.5\" Questar will see through individual 4\" microcells undisturbed, showing more detail than a larger scope that has to put up with the blurring of multiple turbulent cells.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Maksutov scatters less light than a Schmidt-Cassegrain or reflector's larger secondary. The secondary of an 8\" Schmidt can be a full 3.45\" in diameter, for example - a light-scattering obstruction almost as large as the entire 3.5\" Questar aperture! In addition, a Questar's central baffle tube is not merely black plastic or metal painted black to reduce reflections, as with lesser scopes. The Questar central baffle tube actually contains 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast terrestrial, planetary, and lunar details that a larger catadioptric scope or reflector can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 3.5\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a Schmidt's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eBut Questar's quality does not stop with optical performance. What are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar Duplex is a complete telescope in an eight pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach its tabletop tripod legs, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003eThe normally-optional Powerguide III DC drive system\/drive corrector that is factory-installed into this Questar Duplex eliminates the need to stay near an AC power outlet to operate the scope's motor for astronomical observing. The Powerguide III replaces the standard Questar 110 volt AC drive with a DC servo quartz drive to power the scope's drive motor for up to 50 hours from a single 9 volt transistor radio battery. This frees you forever from the need to stay near an AC outlet to observe the skies. The Powerguide III will smoothly track the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003ePushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with 1.4x and 10x sidereal guiding rates in right ascension (dual axis with an optional declination motor). Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar Duplex anywhere in the world without having to worry about finding the proper power frequency or voltage, or having the right kind of AC adapter. With the factory-installed Powerguide III, the Questar Duplex is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar Duplex includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects or terrestrial objects in the low light of early morning or twilight.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar Duplex with standard optical coatings (Questar model #QD3), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eA thermally stable Zerodur ceramic mirror is available as an option to the Questar's standard Pyrex mirror for situations involving large temperature swings. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates the need for refocusing, should this be a concern.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own, plus the multifunction ability to convert in seconds from an astronomical telescope to a terrestrial spotting scope and telephoto lens - this DC-powered Questar Duplex is not only the \"Rolls-Royce\" of telescopes, it is the \"Swiss Army Knife\" of telescopes. If you want the best and most flexible small telescope in the world, the Questar Duplex is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated pyrex mirror\u003c\/li\u003e\n\u003cli\u003eBroadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eQuick disconnect optical tube with built-in photo tripod adapter for terrestrial use\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (five years on coatings and two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221646946377,"sku":"QDBPG","price":7024.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5511_1.jpg?v=1662967126"},{"product_id":"questar-3-5-duplex-broadband-coatings-zerodur-mirror-factory-installed-powerguide-iii","title":"Questar 3.5\" Telescope Duplex, Broadband coatings, Zerodur Mirror, Factory Installed Powerguide III","description":"\u003cp\u003eFor the serious amateur astronomer who would like to take Questar quality into the field for nature studies and photography in all climate extremes, as well as for unsurpassed star-gazing, the 3.5\" Questar Duplex - with broadband optical coatings, a Zerodur mirror, and a DC-powered go anywhere in the world drive system - is ideal. A simple turn of a knurled knob under the scope separates the optical tube of a specially modified 3.5\" Questar from its fork mount. It converts the astronomical telescope into a spotting scope and telephoto lens for terrestrial use, ready to be mounted in seconds on any sturdy camera tripod.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBecause of its high magnification and its ability to focus as close as 8', something virtually no other spotting scope can do, a broadband-coated Duplex makes a superb long distance microscope for close-ups of subjects too small or too dangerous to examine face to face. At its standard 54x magnification, a subject 10 feet away appears the same size as it would if you could get your eye within a mere 2.2\" of it, with a field only 1.8\" wide filling your eyepiece! Imagine the close-up views you will get of hornets' nests, spiders lurking in dew-soaked webs, gape-mouthed baby birds being fed in nearby nests, and more!\u003c\/p\u003e\n\u003cp\u003eThe broadband-coated Questar Duplex gives you unexcelled optics and portability for nature studies and high power\/high contrast photography by day, plus an ultra-compact telescope that opens a universe of viewing pleasure by night. In terms of operational flexibility and visual quality, the Questar Duplex is the optical equivalent of a Swiss Army Knife made by Rolls-Royce.\u003c\/p\u003e\n\u003cp\u003eAt a distance of one mile, optical theory prescribes a resolution of 1\/3rd of an inch for the 3.5\" aperture Questar - but terrestrially this 3.5\" Questar, under good seeing conditions, can routinely resolve much thinner bicycle spokes at one mile, and leaf stems at two miles! As a review in Audubon magazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.) And optical theory says that a Questar should not be able to resolve lunar craterlets and rilles under 1.3 arc seconds across - yet there are countless Questar owners and Questar photos that prove optical theory wrong.\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it exceed the theoretical limits on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces a guaranteed total system performance of 1\/8th wave or better at the eyepiece. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that's indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, those other manufacturers do not specify whether their performance is for individual components or for their system as a whole. In either case, it's a far cry from the 1\/8th wave total system accuracy at the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 3.5\" Questar can often outresolve an 8\" Schmidt-Cassegrain on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere that all telescopes must look through, day and night. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The image-blurring effect of these microcells is largely invisible as long as the bundle of light entering the telescope is smaller than the 4\" diameter of the cells.\u003c\/p\u003e\n\u003cp\u003eIt was for just this reason that an aperture of 3.5\" was chosen for the Questar. In average to mediocre seeing conditions, a 3.5\" Questar will see through individual 4\" microcells undisturbed, showing more detail than a larger scope that has to put up with the blurring of multiple turbulent cells.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Maksutov scatters less light than a Schmidt-Cassegrain or reflector's larger secondary. The secondary of an 8\" Schmidt can be a full 3.45\" in diameter, for example - a light-scattering obstruction almost as large as the entire 3.5\" Questar aperture! In addition, a Questar's central baffle tube is not merely black plastic or metal painted black to reduce reflections, as with lesser scopes. The Questar central baffle tube actually contains 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast terrestrial, planetary, and lunar details that a larger catadioptric scope or reflector can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 3.5\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a Schmidt's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eBut Questar's quality does not stop with optical performance. What are costly options with other scopes - a glass solar filter, a premium Barlow lens, two premium eyepieces - are all standard with a 3.5\" Questar. Also standard are amenities that are simply unavailable on other scopes - a glass solar filter for the finder, an accurate star chart on the self-storing dewcap that slides forward to reveal a useful map of the Moon on the optical tube itself, and a velvet-lined carrying case.\u003c\/p\u003e\n\u003cp\u003eThe 3.5\" Questar Duplex is a complete telescope in an eight pound package. Remove it from its luggage-quality Naugahyde case (or optional leather case), attach its tabletop tripod legs, place it on a table, and you have all the user-friendly controls of a great observatory scope at your fingertips.\u003c\/p\u003e\n\u003cp\u003eUnscrew the dust cap, and you can begin to appreciate the attention to detail lavished on a Questar - for the dust cap is not flimsy press-fit plastic, but solid machined aluminum that threads into the barrel to afford absolute protection to the optics.\u003c\/p\u003e\n\u003cp\u003eLook into the Questar's premium 24mm Brandon eyepiece and you're looking into a 4x finder with an exceptionally wide 12° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 53x telescope for observing the Moon, nebulas, and star clusters. Touch a second lever and a built-in Dakin Barlow instantly increases that eyepiece power to 80x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm Brandon eyepiece and you extend the power range still further, to 80x and 120x. And optional higher and lower power eyepieces are available, for magnifications as low as 40x and as high as 320x. For observing comfort, a rare thing with many scopes, the eyepiece tilts from side to side to the most convenient observing position.\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar, and you'll appreciate the attention to detail even more. The gearless 25:1 ratio slow motion controls operate with a smoothness and freedom from backlash unmatched by any other amateur telescope. The drive gear diameter is fully half the length of the telescope itself, for tracking precision that must be experienced to be believed. No tiny levers need be thrown to disengage the drive for manual operation, as a butter-smooth internal clutch made from micro-rolled discs of stainless steel lets you move the telescope at will. The large setting circles are not merely painted on, but are engraved and then paint-filled, to remain visible even after years of use. 'Jewel-like precision' may be an overworked term, but it's the only one that does justice to a Questar.\u003c\/p\u003e\n\u003cp\u003eA Questar Powerguide III DC drive system\/drive corrector is factory-installed into this Questar Duplex. It replaces the AC motor and 110V power requirement of the standard Duplex. The Powerguide III has a DC servo quartz drive that powers the scope's drive motor for up to 50 hours from a single 9 volt transistor radio battery. This frees you forever from the need to stay near an AC outlet to observe the skies. The Powerguide III smoothly tracks the Moon, planets, star clusters, galaxies, and a host of other deep space objects across the heavens for you, keeping them centered in the eyepiece all night long. During the day, the Questar will also track the Sun, allowing you to observe sunspot patterns. You'll do it in complete safety, as standard equipment glass solar filters provide complete protection against the Sun's fierce radiation for both your eye and your telescope.\u003c\/p\u003e\n\u003cp\u003ePushbuttons on the quartz-controlled Powerguide III hand control allow single axis guided astrophotography with 1.4x and 10x sidereal guiding rates in right ascension (dual axis with an optional declination motor). Other buttons control a built-in map light and the brightness of an optional illuminated reticle guiding eyepiece, and select either a lunar or sidereal drive rate. Another button selects northern or southern hemisphere operation, allowing you to use the Questar Duplex anywhere in the world without having to worry about finding the proper power frequency or voltage, or having the right kind of AC adapter. With the factory-installed Powerguide III, the Questar Duplex is truly a use-anywhere\/use-anytime telescope!\u003c\/p\u003e\n\u003cp\u003eThis broadband-coated Questar Duplex includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat, for an additional improvement in light transmission of 10% per surface. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and low light terrestrial observing and for viewing faint deep space objects at night.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). If prolonged exposure to salt air might be in your scope's future, consider the Questar Duplex with standard optical coatings (Questar model #QD3PG), rather than this broadband-coated version. You will lose some light transmission, but will gain a measure of optical coating longevity. Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case of any spotting scope to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eThe scope's thermally-stable Zerodur ceramic mirror eliminates the minor need to refocus the scope as it cools to ambient temperature in situations involving large temperature swings. With a conventional Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when the scope is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Although the 3.5\" mirror of the Questar cools down much more rapidly than a larger mirror, some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, the Zerodur mirror in this scope eliminates even the need for minor refocusing when the optical tube is taken outside in cold temperatures for a quick terrestrial photography session, or the complete scope is taken out during a winter's night for some star-gazing, should this be a concern or an inconvenience.\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism, five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, total freedom from temperature-related focusing issues, with an image clarity and contrast in a class all its own, the multifunction ability to convert in seconds from an astronomical telescope to a terrestrial spotting scope and telephoto lens, AC cord-free battery-operated operation - this Questar Duplex with broadband coatings and a Zerodur mirror is not only the \"Rolls-Royce\" of telescopes, it is the \"Swiss Army Knife\" of telescopes. If you want the best and most flexible small telescope in the world, this Questar Duplex is it. Period.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e162x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.3 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used)\u003c\/li\u003e\n\u003cli\u003eBuilt-in 4x finder (6x when 16mm eyepiece is used)\u003c\/li\u003e\n\u003cli\u003eVHR silver coated and overcoated Zerodur glass ceramic mirror\u003c\/li\u003e\n\u003cli\u003eBroadband dielectric multicoated optics\u003c\/li\u003e\n\u003cli\u003eBuilt-in star diagonal\u003c\/li\u003e\n\u003cli\u003eDual arm fork mount\u003c\/li\u003e\n\u003cli\u003eQuick disconnect optical tube with built-in photo tripod adapter for terrestrial use\u003c\/li\u003e\n\u003cli\u003eSetting circles (r. a. circle power driven)\u003c\/li\u003e\n\u003cli\u003eSidereal rate AC motor drive (2.7 watts)\u003c\/li\u003e\n\u003cli\u003eManual slow motion controls\u003c\/li\u003e\n\u003cli\u003eThread-in dust cap\u003c\/li\u003e\n\u003cli\u003e1.5\" aperture off-axis solar filter\u003c\/li\u003e\n\u003cli\u003eSolar filter for finder\u003c\/li\u003e\n\u003cli\u003eTabletop tripod legs\u003c\/li\u003e\n\u003cli\u003eLocking hard case\u003c\/li\u003e\n\u003cli\u003eSelf-storing dewcap with embossed star chart\u003c\/li\u003e\n\u003cli\u003eEmbossed Moon chart on scope barrel\u003c\/li\u003e\n\u003cli\u003eTen-year warranty (two years on drive and focuser).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221646979145,"sku":"QDBZPG","price":7424.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5512_1.jpg?v=1662967128"},{"product_id":"questar-7-classic-titanium-maksutov-cassegrain-broadband-coatings","title":"Questar 7\" Classic Titanium Maksutov-Cassegrain, Broadband Coatings","description":"\u003cp\u003eThere are mere mortal telescopes and then there is the Questar Seven Classic Titanium with broadband coatings, which inhabits a higher plane of astronomical excellence than an ordinary telescope . . .\u003c\/p\u003e\n\u003cp\u003eObserve through a Questar Seven Classic Titanium optical tube with broadband optical coatings, and you'll see detail and clarity in the skies that you have never seen through a lesser scope, or even through many larger scopes. I have compared my own Questar Seven to a 14\" Schmidt-Cassegrain on deep space objects such as the Sombrero galaxy, the Saturn Nebula, and Omega Centauri. While the 14\" scope was brighter on the fainter objects, the superior contrast and resolution of the Questar Seven was easily visible . . . even to the owner of the 14\" scope. The Crêpe Ring and Encke's Division in the rings of Saturn are routine with a Seven Classic in good seeing, as are myriad whorls and festoons in Jupiter's belts and hundreds of sub-kilometer craters on the lunar surface.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it outperform larger scopes on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces guaranteed total system performance at the Cassegrain focus of 1\/8th wave or better. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that is indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, they do not specify whether that is for individual components or the system as a whole. In either case, it's a far cry from the 1\/8th wave \u003cem\u003etotal system accuracy \u003c\/em\u003eentering the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 7\" Questar can routinely outresolve a 14\" Schmidt-Cassegrain (or virtually any other larger aperture catadioptric or reflector scope) on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere all telescopes must look through. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The larger the aperture of the scope, the greater the image-blurring effect of these microcells, as the larger scopes simply have to look through more of these turbulent cells than a smaller scope.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Seven Maksutov (only 1.87\" in diameter) scatters far less light than a 14\" Schmidt-Cassegrain's much larger 4.5\" secondary. The same holds true with any other larger reflector or catadioptric telescope you care to name. They all have larger light-scattering secondary or diagonal mirror obstructions than a 7\" Questar Classic Titanium. In addition, a Questar's central baffle tube is not merely black plastic or painted black to reduce reflections, as with lesser scopes, but is a centerless ground stainless steel tube, anodized matte black and containing a wire helix with 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast planetary and lunar details that a larger scope can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 7\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a larger scope's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eThe Questar Classic Titanium is precision-fabricated of specially lightened aluminum and titanium, with a black and blue anodized finish for long life. Questar engaged in an extensive heat transfer analysis to refine the shaping and milling of the internal components to dissipate heat and rapidly bring the optics down to ambient temperature quickly. This was done to avoid having to resort to the use of powered fans to cool the optics as others do (which can suck image-degrading dust into the optical path).\u003c\/p\u003e\n\u003cp\u003eAll internal components (such as the main tube mounting plate, mirror thimble, and central light baffle tube) are titanium, with milled surfaces to increase heat transfer and lighten weight. The optical tube is extruded and stress-relieved aluminum. The control box is machined cast aluminum, with milled internal surfaces to increase heat transfer and lighten weight. It is externally painted with special aluminum paint and clear overcoated for durability. The interior is finished in anti-reflective matte black paint.\u003c\/p\u003e\n\u003cp\u003eThe control knobs on the rear cell are turret lathe-turned anodized aluminum, with sharts and control levers of stainless steel. The focus knob focuses the scope by turning a spring-loaded 1\/4\"-32 thread stainless steel focus rod that acts directly on the titanium mirror thimble to move the primary mirror along the titanium central baffle tube within the optical tube. A precision linear ball-type bearing, integrated with the mirror mounting, is matched to central tube thimble to minimize mirror shift when focusing.\u003c\/p\u003e\n\u003cp\u003eThe optical tube barrel of the Questar Seven Classic Titanium is wrapped with an accurate full-color silk-screened star chart. The thread-on dewcap is wrapped with a useful silk-screened map of the Moon.\u003c\/p\u003e\n\u003cp\u003eThe Seven Classic Titanium uses a 7\" diameter meniscus corrector lens of Grade A BK7 optical glass, with magnesium fluoride anti-reflection coatings for high light transmission and minimal reflected light loss. The 7.6\" diameter primary mirror is Pyrex, aluminized, with a silicon monoxide (quartz) overcoating for long life.\u003c\/p\u003e\n\u003cp\u003eInsert the Questar's premium 24mm 1.25\" Questar Brandon eyepiece into the eyepiece holder on the top of the control box at the rear of the scope. Look in and you're looking into a 7.6x finder with a wide 7° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 106x telescope for observing the Moon, nebulas, galaxies, and star clusters. Touch a second lever and a built-in 2x Dakin Barlow instantly increases that eyepiece power to 212x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm 1.25\" Questar Brandon eyepiece and you extend the power range still further, to an 11.5x finder with a 4.6° field and a 159x and 318x telescope. You never have to worry about the telescope and finderscope getting out of alignment with each other, because the finderscope in an integral part of the telescope body itself. Optional higher and lower power 1.25\" Questar Brandon eyepieces are available, for magnifications as low as 63.5x and as high as 635x.\u003c\/p\u003e\n\u003cp\u003eIn addition, the Questar Classic Titanium can be equipped with an optional 2\" mirror star diagonal that threads onto the rear cell. This lets you use longer focal length 2\" Brandon and third party eyepieces to lower the magnification to as little as 45x.\u003c\/p\u003e\n\u003cp\u003eThe Questar Classic Titanium weighs 19 pounds, 21 pounds if you add the thread-on dew shield). It measures 22.6\" long. The low profile mounting adapter block on the underside of the Classic Titanium has both 1\/4\"-20 and 3\/8\"-16 mounting holes to allow to be installed on the Questar Equatorial Fork Mount (our part #20004) and Questar Large Classic Titanium Pier (our part #29338) for astronomical use. It is well-balanced and relatively light, allowing it to be mounted on any suitably sturdy tripod for terrestrial operation. It can also be adapted to your own equatorial mount with minimal effort.\u003c\/p\u003e\n\u003cp\u003eThis Questar Seven Classic Titanium has a broadband dielectric multicoatings package that includes ultra-high transmission\/low reflectivity broadband dielectric multicoatings on both sides of its objective lens for a light loss of less than 1\/10th of 1% per surface for the brightest possible images. This compares with a light loss of 1% per surface with standard magnesium fluoride antireflection coatings. This multicoatings package also includes high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of standard aluminum coatings with a silicon monoxide overcoat. The broadband coatings package gives you a full 22% overall gain in light transmission and contrast that's very useful for photography and when viewing faint deep space objects.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eA thermally stable Zerodur ceramic mirror is also available as an option in place of the standard Pyrex mirror. As with any Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more when a Questar is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. Some people find the need for even an occasional refocusing to be annoying. Since a Zerodur mirror exhibits virtually no expansion or contraction as temperatures change, this option eliminates this need for refocusing. This option is well worth considering due to the large thermal mass of the 7\" mirror and its consequently longer cool-down time than a smaller scope. I have both broadband coatings and a Zerodur mirror on my Questar Seven and can recommend them without reservation.\u003c\/p\u003e\n\u003cp\u003eThe Questar Seven Classic Titanium comes in a high impact ABS plastic sealed carrying case with wheels and transport handle. A basic 35mm camera coupling set is also included (needs a Questar T-ring to connect to your camera).\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism and five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. For those individuals who appreciate the very finest that life has to offer, a Questar Seven Classic Titanium with broadband optical coatings will prove to be an absolutely eye-opening astronomical revelation.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eVery Good\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2425mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/13.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e19 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e423x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e19 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.65 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221647077449,"sku":"Q7CBT","price":12795.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5514_1.jpg?v=1662967132"},{"product_id":"questar-7-classic-titanium-maksutov-cassegrain-broadband-coatings-quartz-mirror","title":"Questar 7\" Classic Titanium Maksutov-Cassegrain, Magnesium Fluoride AR and Silver Reflecting Coatings, Quartz Mirror","description":"\u003cp\u003eThis Questar Seven Classic Titanium uses the same quartz mirror and coatings combination as the renowned 50th Anniversary 3.5\" Questar, perhaps the ultimate small telescope. Is this Questar the ultimate mid-sized telescope? . . .\u003c\/p\u003e\n\u003cp\u003eLook through a Questar Seven Classic Titanium optical tube with a zero thermal expansion quartz mirror, and you're looking through an absolutely superb example of the telescope maker's art. You'll see detail and clarity in the skies that you have never seen through any lesser scope, or even through many larger scopes. I have compared my own Questar Seven to a 14\" Schmidt-Cassegrain on deep space objects such as the Sombrero galaxy, the Saturn Nebula, and Omega Centauri. While the 14\" scope was brighter on the fainter objects, the superior contrast and resolution of the Questar Seven was easily visible . . . even to the owner of the 14\" scope. The Crêpe Ring and Encke's Division in the rings of Saturn are routine with a Seven Classic in good seeing, as are myriad whorls and festoons in Jupiter's belts and hundreds of sub-kilometer craters on the lunar surface.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWhat is it about a Questar that lets it outperform larger scopes on a day in\/day out basis?\u003c\/p\u003e\n\u003cp\u003eSimply this: a fanatical devotion to hand-crafted accuracy.\u003c\/p\u003e\n\u003cp\u003eEach optical element in a Questar typically tests out at a truly outstanding 1\/50th wave accuracy (shaped to within four ten-millionths of an inch of perfection!) This produces guaranteed total system performance at the Cassegrain focus of 1\/8th wave or better. That's twice the accuracy needed to meet Lord Rayleigh's Criterion, which specifies the level of optical excellence required to yield visual performance that is indistinguishable from perfect optics.\u003c\/p\u003e\n\u003cp\u003eMost commercial telescopes claim to be \"diffraction-limited\" (which is generally assumed to mean 1\/4th wave accuracy). However, they do not specify whether that is for individual components or the system as a whole. In either case, it's a far cry from the 1\/8th wave \u003cem\u003etotal system accuracy \u003c\/em\u003eentering the eyepiece of a Questar.\u003c\/p\u003e\n\u003cp\u003eThis significant difference in total system accuracy is one reason why a 7\" Questar can routinely outresolve a 14\" Schmidt-Cassegrain (or virtually any other larger aperture catadioptric or reflector scope) on globular clusters, binary stars, and lunar and planetary details - with the Questar invariably exceeding Dawes' limit for the best resolution available from an optical system of its aperture.\u003c\/p\u003e\n\u003cp\u003eA second reason is the turbulent Earth atmosphere all telescopes must look through. In essence, when observing, you are usually looking through bubbles of disturbed air - microcells typically 4\" in diameter in the layer of the atmosphere nearest the surface of the Earth. The larger the aperture of the scope, the greater the image-blurring effect of these microcells, as the larger scopes simply have to look through more of these turbulent cells than a smaller scope.\u003c\/p\u003e\n\u003cp\u003eFinally, there is the matter of contrast. The small secondary mirror of a Questar Seven Maksutov (only 1.87\" in diameter) scatters far less light than a 14\" Schmidt-Cassegrain's much larger 4.5\" secondary. The same holds true with any other larger reflector or catadioptric telescope you care to name. They all have larger light-scattering secondary or diagonal mirror obstructions than a 7\" Questar Classic Titanium. In addition, a Questar's central baffle tube is not merely black plastic or painted black to reduce reflections, as with lesser scopes, but is a centerless ground stainless steel tube, anodized matte black and containing a wire helix with 19 internal knife-edge baffles to eliminate low-angle reflections that no paint alone can stop. The result is that a Questar scatters less light from the bright areas of an image into the dark - crisply defining high contrast planetary and lunar details that a larger scope can wash out in a haze of scattered light.\u003c\/p\u003e\n\u003cp\u003eA large aperture scope does have greater light-gathering than a 7\" Questar to capture additional faint deep space objects from a dark sky site. However, the higher contrast of a Questar lets the multitude of galaxies and nebulas within its grasp stand out more distinctly against a darker sky background, particularly from light-polluted suburban or city sites where a larger scope's greater light-gathering capacity submerges subtle low-contrast deep space details in a fog of city light.\u003c\/p\u003e\n\u003cp\u003eAs a Rolls-Royce is to automobiles, so is a Questar to telescopes - the very finest hand-crafted optical performance that money can buy.\u003c\/p\u003e\n\u003cp\u003eThe Questar Classic Titanium is precision-fabricated of specially lightened aluminum and titanium, with a black and blue anodized finish for long life. Questar engaged in an extensive heat transfer analysis to refine the shaping and milling of the internal components to dissipate heat and rapidly bring the optics down to ambient temperature quickly. This was done to avoid having to resort to the use of powered fans to cool the optics as others do (which can suck image-degrading dust into the optical path).\u003c\/p\u003e\n\u003cp\u003eAll internal components (such as the main tube mounting plate, mirror thimble, and central light baffle tube) are titanium, with milled surfaces to increase heat transfer and lighten weight. The optical tube is extruded and stress-relieved aluminum. The control box is machined cast aluminum, with milled internal surfaces to increase heat transfer and lighten weight. It is externally painted with special aluminum paint and clear overcoated for durability. The interior is finished in anti-reflective matte black paint.\u003c\/p\u003e\n\u003cp\u003eThe control knobs on the rear cell are turret lathe-turned anodized aluminum, with sharts and control levers of stainless steel. The focus knob focuses the scope by turning a spring-loaded 1\/4\"-32 thread stainless steel focus rod that acts directly on the titanium mirror thimble to move the primary mirror along the titanium central baffle tube within the optical tube. A precision linear ball-type bearing, integrated with the mirror mounting, is matched to central tube thimble to minimize mirror shift when focusing.\u003c\/p\u003e\n\u003cp\u003eThe optical tube barrel of the Questar Seven Classic Titanium is wrapped with an accurate full-color silk-screened star chart. The thread-on dewcap is wrapped with a useful silk-screened map of the Moon.\u003c\/p\u003e\n\u003cp\u003eInsert the Questar's premium 24mm 1.25\" Questar Brandon eyepiece into the eyepiece holder on the top of the control box at the rear of the scope. Look in and you're looking into a 7.6x finder with a wide 7° field. A finger touch on a convenient lever at the rear of the scope changes the finder into a 106x telescope for observing the Moon, nebulas, galaxies, and star clusters. Touch a second lever and a built-in 2x Dakin Barlow instantly increases that eyepiece power to 212x for closer observing. Exchange the 24mm eyepiece for the supplied 16mm 1.25\" Questar Brandon eyepiece and you extend the power range still further, to an 11.5x finder with a 4.6° field and a 159x and 318x telescope. You never have to worry about the telescope and finderscope getting out of alignment with each other, because the finderscope in an integral part of the telescope body itself. Optional higher and lower power 1.25\" Questar Brandon eyepieces are available, for magnifications as low as 63.5x and as high as 635x.\u003c\/p\u003e\n\u003cp\u003eIn addition, the Questar Classic Titanium can be equipped with an optional 2\" mirror star diagonal that threads onto the rear cell. This lets you use longer focal length 2\" Brandon and third party eyepieces to lower the magnification to as little as 45x.\u003c\/p\u003e\n\u003cp\u003eThe Questar Classic Titanium weighs 19 pounds, 21 pounds if you add the thread-on dew shield). It measures 22.6\" long. The low profile mounting adapter block on the underside of the Classic Titanium has both 1\/4\"-20 and 3\/8\"-16 mounting holes to allow to be installed on the Questar Equatorial Fork Mount (our part #20004) and Questar Large Classic Titanium Pier (our part #29338) for astronomical use. It is well-balanced and relatively light, allowing it to be mounted on any suitably sturdy tripod for terrestrial operation. It can also be adapted to your own equatorial mount with minimal effort.\u003c\/p\u003e\n\u003cp\u003eThis Questar Seven Classic Titanium uses the same optical materials and coatings combination as the renowned 50th Anniversary 3.5\" Questar, perhaps the ultimate small telescope. The Seven Classic's zero thermal expansion quartz mirror eliminates the need to refocus the scope as it cools to ambient temperature in situations involving large temperature swings. With a conventional Pyrex mirror telescope, if the difference in temperature between indoors and outdoors is 30 degrees or more Fahrenheit when the scope is taken outside, minor refocusing will be required as its mirror contracts while cooling down to the outdoor air temperature. This is particularly true with a relatively large aperture scope like this Seven Classic, which has an oversize 7.6\" primary mirror. Some people find the need for even an occasional refocusing to be annoying. Since a quartz mirror exhibits no expansion or contraction as temperatures change, the quartz mirror in this Questar Seven Classic Titanium eliminates any need for even minor refocusing. You can take it out into the coldest night or hottest day and use it instantly, without any need for it to acclimate to the ambient temperature.\u003c\/p\u003e\n\u003cp\u003eThis Questar Seven Classic Titanium uses high reflectivity silver mirror coatings with a protective overcoating of thorium fluoride instead of a standard Questar's aluminum coatings with a silicon monoxide overcoat. The two silver mirrors provide a 10% light gain per surface, compared with aluminized mirrors. Magnesium fluoride antireflection coatings are used on the Grade A BK7 optical glass meniscus corrector lens on this scope, as mag fluoride coatings are optimally matched to the reflectivity response of the quartz\/silver\/thorium-coated mirrors.\u003c\/p\u003e\n\u003cp\u003eThis broadband coatings package is not recommended if you live full time on ocean-front property, or spend much of the year at the seaside. Constant exposure to salt air can adversely affect the silver mirror coatings. Occasional visits to the shore are not a problem, only extended stays (particularly if the scope is not packed away in its case when not in use). Adding a few packets of desiccant (silica gel or similar, available at most camera stores) to the case to absorb moisture when near large bodies of salt water would be a helpful preventative measure in any event.\u003c\/p\u003e\n\u003cp\u003eThe Questar Seven Classic Titanium comes in a high impact ABS plastic sealed carrying case with wheels and transport handle. A basic 35mm camera coupling set is also included (needs a Questar T-ring to connect to your camera).\u003c\/p\u003e\n\u003cp\u003eThis Questar is protected by a ten-year Questar warranty (two-year warranty on the focuser mechanism and five years on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAbsolutely pinpoint resolution, total freedom from spurious color and distortion, with an image clarity and contrast in a class all its own - a Questar is truly the Rolls-Royce of telescopes. For those individuals who appreciate the very finest that life has to offer, a Questar Seven Classic Titanium with broadband optical coatings and a quartz mirror will prove to be an absolutely eye-opening astronomical revelation. It is a telescope you can live with comfortably for the rest of your life.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBinary and Star Cluster Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eVery Good\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2425mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/13.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalaxy and Nebula Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e19 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e423x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLunar Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGreat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e19 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlanetary Observation\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.65 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221647175753,"sku":"Q7CQT","price":14695.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5516_1.jpg?v=1662967137"},{"product_id":"celestron-nexstar-4-se-4-go-to-maksutov-cassegrain","title":"Celestron NexStar 4 SE 4\" Go-to Maksutov-Cassegrain  11049","description":"\u003cp\u003eIf you want a small scope with big features, this 4\" Celestron NexStar 4 SE may be what you're looking for. It has sharp 4\" Maksutov-Cassegrain optics, combined with 21st century computerized go-to technology and advanced multicoatings, at a price that's very affordable.\u003c\/p\u003e\n\u003cp\u003eThis 4\" Celestron NexStar 4 SE go-to Maksutov-Cassegrain is a great alternative to competitive 3.5\" Maksutovs. It has 30% more light gathering and 14% higher resolution than another manufacturer's similarly-priced 3.5\" Mak. Even better, the NexStar 4 SE has the clear optical advantage of Celestron's state-of-the-art XLT multicoatings. Across the full photo\/visual spectrum from 400nm to 750nm, independent laboratory tests show the new Starbright XLT coatings are 16% brighter than even Celestron's legendary original Starbright multicoatings - long the industry standard.\u003c\/p\u003e\n\u003cp\u003eThe Celestron NexStar 4 SE comes with a red dot finder, tripod, 25mm E-Lux Plössl eyepiece, and flashlight battery-operated dual-axis motor drives. Its go-to computerized hand control will find nearly 40,000 stars and deep space objects for you automatically, nearly 10,000 more than the competitive 3.5\" Mak.\u003c\/p\u003e\n\u003cp\u003eNew SkyAlign technology makes it easy to line up this Celestron telescope on the sky so it can find celestial objects for you. You don't have to level the scope or point it north, or know which stars are which. Simply point the scope at any three bright stars, or at two bright stars and a planet or the Moon (you don't even have to know which stars and planet you're looking at). The telescope will then know how the sky is laid out that night and will be ready to find and track those nearly 40,000 objects for you at your command.\u003c\/p\u003e\n\u003cp\u003eThe Celestron NexStar 4 SE has all the features and optical performance you need to keep you happily observing for years to come - and a classic Celestron color scheme that will draw admiring glances wherever you take your scope. It may well be all the telescope you'll ever need!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Telescope's Optical System . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optical tube:\u003c\/strong\u003e 4\" aperture (1325mm focal length f\/13) aluminum tube, 13.5\" long, weighing less than 2 lbs. One-knob quick-release attachment to fork arm for fast assembly in the field. Guaranteed diffraction-limited optical performance. Celestron orange finish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStarbright XLT fully-multicoated:\u003c\/strong\u003e This state-of-the-art coatings package includes a high reflectivity multilayer aluminum mirror enhanced with titanium dioxide for high reflectivity, plus a unique combination of magnesium fluoride and hafnium dioxide antireflection coatings on both sides of the Maksutov corrector lens. Starbright XLT multicoatings give you higher light transmission for brighter deep space images. They also increase the contrast of subtle lunar and planetary details when compared with a scope with standard coatings or multicoatings. For more information on the XLT multicoatings, click on the \"4\" Starbright XLT optics\" icon in the support tab above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRed dot finder:\u003c\/strong\u003e Star Pointer non-magnifying variable brightness red dot-type. The Star Pointer is the quickest and easiest way to point your telescope exactly to the desired object in the sky. It's like having a laser pointer that appears to shine directly onto the night sky. No need to worry about the inverted images that you see through traditional finders. Just align the red dot seen through the Star Pointer with the desired star in the sky. It's that easy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal flip mirror system:\u003c\/strong\u003e An internal first surface flip mirror, operated by a knob on the rear cell, directs the incoming light either to a 90° viewing angle 1.25\" eyepiece holder at the top of the rear cell for astronomical observing (or mirror-image terrestrial observing), or to the Cassegrain focus at the center of the rear cell. \u003cbr\u003eThe Cassegrain focus is threaded to accept either an optional NexStar 4SE-specific 45° viewing angle erect image 1.25\" diagonal for right-reading (correctly oriented) terrestrial observing or an optional NexStar 4SE-specific camera adapter for terrestrial and astronomical photography. Standard SCT rear cell 5\"\/8\"\/9¼\"\/11\"\/14\" photographic and visual accessories will not work with this scope.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEyepiece:\u003c\/strong\u003e 1.25\" 25mm Plössl (53x). The eyepiece field of view is 1° across, twice the diameter of the full Moon.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Telescope's Mount . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFork mount\/drive system:\u003c\/strong\u003e The heavy-duty single fork arm is made of die-cast aluminum, so it is rigid and damps vibrations quickly. The optical tube is offset slightly so that its center of mass is over the axis of rotation of the mount, keeping the optical tube properly balanced in all planes. Built-in friction clutches in altitude and azimuth keep the optical tube fixed in place when eyepieces or accessory loads are changed. No mechanical locking levers or knobs are required.\u003cbr\u003e\u003cbr\u003eThe 11 lb. mount includes slewing\/tracking motors in both altitude and azimuth. There are nine user-selectable slewing\/centering\/guiding speeds - 6°\/second; 3°\/second; 1.5°\/second; and 128, 64, 16, 8, 2, and 1x sidereal. There are also three selectable drive rates - sidereal, solar, and lunar. The drives normally operate in the altazimuth mode (right\/left up\/down) to locate and track objects for visual use and casual solar system photography.\u003c\/p\u003e\n\u003cp\u003eIf long exposure deep space photography is planned, the tripod includes a built-in wedge that quickly converts the scope to equatorial operation, although deep space imaging will realistically be limited by the scope's relatively small aperture and long focal ratio.\u003cbr\u003e\u003cbr\u003eA compartment in the drive base accepts eight user-supplied AA batteries for powering the scope in the field. The Celestron Power Tank Lithium (#PTL12V) is a highly recommended optional 7 amp-hour capacity multi-purpose rechargeable 12V DC battery that can provide several nights worth of observing from a single charge. To conserve battery life, an optional 2.5 Amp AC adapter (#2338N) is available to operate the scope from household current during backyard use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComputer control:\u003c\/strong\u003e The supplied NexStar computer hand control has a nearly 40,000 object database of stars and objects that it can locate and track for you. The database includes the complete RNGC, Messier, and Caldwell catalogs; selected SAO stars (including the best variable stars and multiple star systems); the planets; the Moon; and more. You can also store and edit the right ascension and declination coordinates of 200 objects of your own choosing, such as favorite deep space objects or the comet and asteroid coordinates published monthly in \u003cem\u003eAstronomy\u003c\/em\u003e and \u003cem\u003eSky \u0026amp; Telescope\u003c\/em\u003e magazines.\u003cbr\u003e\u003cbr\u003eYou have several ways to have the NexStar computer find celestial objects for you. The most popular and easiest to use is Celestron's exclusive SkyAlign no-guesswork technology. After turning on the scope, simply enter the date and time and your location, then point the scope at any three bright stars, or at two bright stars and a planet or the Moon (you don't even have to know which stars and planet you're looking at, and you don't have to know and locate specific stars as you do with other alignment programs). The NexStar computer will use the stars you've pointed at to model the sky overhead. Once it knows what the sky looks like, it's ready to find and track nearly 40,000 objects for you at your command. Not all of the objects may be easily visible, however, due to the scope's limited aperture.\u003c\/p\u003e\n\u003cp\u003eThe computer hand control includes a built-in RS-232 communication port allowing you to use a CCD autoguider for deep space photography. It also lets you use popular astronomy software to control the NexStar from a lap top or personal computer for remote control point-and-click slewing. The hand control software can now be flash-upgraded from the Celestron website. You can always have the most up-to-date control program, database, and software features simply by downloading the new programs as they are posted.\u003c\/p\u003e\n\u003cp\u003eThe scope can be operated with its ergonomically designed hand control conveniently docked in its fork arm storage compartment. You can also remove the control and its coiled connecting cord from the fork arm for hand-held use. There's no need to worry about wrapping the cord around the mount as you walk around the scope to observe different parts of the sky. The hand control plugs into the fork arm rather than the base, so it always moves with the scope.\u003cbr\u003e\u003cbr\u003eThe computer includes a camera control software program and a camera shutter cable. These let you remotely take a series of timed exposures using your digital SLR camera (connected to the scope by an appropriate camera adapter). This can be very useful during lunar or solar eclipses and during occultation events, since you won't have to miss any of the sights while worrying about the operation of your camera.\u003cbr\u003e\u003cbr\u003eAll of the database and scope operation information is displayed on a double line, 16-character, liquid crystal display on the hand control. There are 19 fiber optic backlit LED buttons to make it easy for you to control the computer without affecting your dark-adapted vision. If you are new to astronomy, you may wish to start by using the computer's built-in Sky Tour feature. This program commands the NexStar 4 SE to find the most interesting objects in the sky and automatically slews to them one at a time for you to observe at your leisure.\u003cbr\u003e\u003cbr\u003eNo matter what level of experience you start from, however, the NexStar 4 SE will unfold many of the wonders of the Universe for you, your family, and your friends. For much more information on the NexStar computer and the unique SkyAlign software, click on the \"NexStar 4\/5 computer with SkyAlign\" icon in the support tab above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdjustable height altazimuth\/equatorial tripod:\u003c\/strong\u003e The 10 lb. adjustable height altazimuth tripod has tubular chromed steel legs for stability, and a combined die-cast spreader bar\/accessory tray that is cut out to hold two 2\" eyepieces and four 1.25\" eyepieces. The spreader bar is spring loaded, so that it can't accidentally detach from the tripod.\u003c\/p\u003e\n\u003cp\u003eSpring loaded attachment bolts, that also can't be lost in the dark, hold the telescope to the no-tool adjustable wedge tilt plate that allows equatorial tracking for astrophotography. The tilt plate has a built-in latitude scale and can be operated from 0° to 90°, allowing both polar and altazimuth operation without having to buy a separate wedge.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo-year warranty:\u003c\/strong\u003e All Celestron go-to telescopes have a two-year warranty, double that of competitive go-to scopes.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Kz_MJQF37lY\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e102mm (4.02\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e1325mm (52\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio:\u003c\/td\u003e\n\u003ctd\u003ef\/13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e25mm (0.98\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope:\u003c\/td\u003e\n\u003ctd\u003eStarPointer™ red dot finderscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal:\u003c\/td\u003e\n\u003ctd\u003eInternal Flip mirror for straight thru or 90° viewing angle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube:\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e241x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e15x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude:\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh):\u003c\/td\u003e\n\u003ctd\u003e1.37 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes):\u003c\/td\u003e\n\u003ctd\u003e1.14 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye):\u003c\/td\u003e\n\u003ctd\u003e212x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction:\u003c\/td\u003e\n\u003ctd\u003e35mm (0.38\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Diameter:\u003c\/td\u003e\n\u003ctd\u003e34%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Area:\u003c\/td\u003e\n\u003ctd\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings:\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length:\u003c\/td\u003e\n\u003ctd\u003e343mm (13.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter:\u003c\/td\u003e\n\u003ctd\u003e125mm (4.9\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight:\u003c\/td\u003e\n\u003ctd\u003e6 lbs (2.7 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail:\u003c\/td\u003e\n\u003ctd\u003eCG-5 Dovetail bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMOUNT INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type:\u003c\/td\u003e\n\u003ctd\u003eComputerized Altitude-Azimuth Single Fork Arm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstrument load capacity:\u003c\/td\u003e\n\u003ctd\u003e10 lbs (4.54 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight adjustment range (includes mount and tripod):\u003c\/td\u003e\n\u003ctd\u003e939.8mm - 2397mm (37\" - 55\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTripod leg diameter:\u003c\/td\u003e\n\u003ctd\u003e38.1mm (1.5\") Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Head Weight:\u003c\/td\u003e\n\u003ctd\u003e7 lbs (3.2 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Tray:\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTripod Weight:\u003c\/td\u003e\n\u003ctd\u003e10 lbs (4.54 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlew Speeds:\u003c\/td\u003e\n\u003ctd\u003e9 slew speeds - max speed 3°\/second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking Rates:\u003c\/td\u003e\n\u003ctd\u003eSidereal, Solar and Lunar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking Modes:\u003c\/td\u003e\n\u003ctd\u003eAlt-Az, EQ North and EQ South\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGPS:\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Compatibility:\u003c\/td\u003e\n\u003ctd\u003eCG-5 dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Auxiliary Ports:\u003c\/td\u003e\n\u003ctd\u003e1x AUX Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoguide Port:\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB Port:\u003c\/td\u003e\n\u003ctd\u003eYes, Hand Control input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirements:\u003c\/td\u003e\n\u003ctd\u003e8-AA batteries (not included) and 12 VDC-750 mA (Tip positive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Drive:\u003c\/td\u003e\n\u003ctd\u003eDC servo motors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlignment Procedures:\u003c\/td\u003e\n\u003ctd\u003eSkyAlign, 1-Star Align, 2-Star Align, Auto 2-Star Align, Solar System Align, EQ North \/ EQ South Alignment (EQ align requires an equatorial wedge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeriodic Error Correction:\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputerized Hand Control:\u003c\/td\u003e\n\u003ctd\u003eDouble line, 18 character Liquid Crystal Display with 19 fiber optic backlit LED buttons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNexStar+ Database:\u003c\/td\u003e\n\u003ctd\u003e38,181 accessible objects. Enhanced information on over 200 objects.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware:\u003c\/td\u003e\n\u003ctd\u003eCelestron Starry Night Special Edition Software and SkyPortal App\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Kit Weight:\u003c\/td\u003e\n\u003ctd\u003e23 lbs (10.4 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Items:\u003c\/td\u003e\n\u003ctd\u003eOptical tube\u003cbr\u003eSingle Fork Arm Mount and Tripod\u003cbr\u003eAccessory Tray\u003cbr\u003eStar Pointer Finderscope\u003cbr\u003eBuilt-In Wedge\u003cbr\u003eNexStar+ Hand Control\u003cbr\u003e25mm eyepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Warning\u003c\/td\u003e\n\u003ctd class=\"solar-warning\"\u003e\n\u003cul class=\"solar-warning-text\"\u003e\n\u003cli\u003eNever look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.\u003c\/li\u003e\n\u003cli\u003eNever use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.\u003c\/li\u003e\n\u003cli\u003eNever leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalifornia Residents\u003c\/td\u003e\n\u003ctd class=\"cali-prop65-warning\"\u003e\n\u003cspan class=\"prop65-warning-content\"\u003e\u003cimg class=\"cali-warning\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/warning.png?10476927669983959391\"\u003e\u003c\/span\u003e\n\u003cp class=\"cali-warning-text\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCancer and Reproductive Harm -\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.p65warnings.ca.gov\/\" target=\"_blank\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40221659955273,"sku":"NX4SE","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/12193_1.jpg?v=1662967589"},{"product_id":"celestron-nexstar-90slt-90mm-go-to-altazimuth-maksutov-cassegrain","title":"Celestron NexStar 90 SLT 90mm Go-To Altazimuth Maksutov-Cassegrain Telescope 22087","description":"\u003cp\u003eThe NexStar 90 SLT (Star Locating Telescope) is an affordable go-to 90mm Maksutov-Cassegrain with high contrast\/high resolution catadioptric optics that folds a 49\" optical system into a 12\" tube.\u003c\/p\u003e\n\u003cp\u003eYou don't have to know how to read a star chart - or even know which way is North - to find your way around the sky with the Celestron 90SLT 90mm go-to Maksutov-Cassegrain. It has Celestron's famous SkyAlign easy alignment technology and a StarPointer red dot LED finder to make lining up on the sky a breeze.\u003c\/p\u003e\n\u003cp\u003eOnce aligned, the scope's computer hand control will find more than 4,000 celestial objects for you and will track them unerringly all night long while you observe. With its pre-assembled adjustable height steel tripod and easy no-tool assembly, the NexStar 90SLT can be up and ready to take you on a tour of the Universe in a matter of minutes.\u003c\/p\u003e\n\u003cp\u003eThe 90mm (3.5\") Maksutov-Cassegrain folded catadioptric optical system of the NexStar 90SLT provides exceptional high contrast\/high resolution solar system images - major surface details on Mars; multiple storm bands on Jupiter; even Cassini's Division in the rings of Saturn frequently popping into view in good seeing conditions; and more. Outside the solar system, the high resolution Celestron 90SLT splits close binary stars with ease, resolves open and globular star clusters, reveals the brighter nebulas and galaxies, and more.\u003c\/p\u003e\n\u003cp\u003eThe NexStar 90SLT has all the features and optical performance needed to keep a casual backyard astronomer happily observing for years. And it can be used for terrestrial observing, too - birdwatching, scanning the scenery from the home with a view, and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Telescope's Optical System . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optical system:\u003c\/strong\u003e Aluminum tube 90mm aperture (1250mm focal length f\/13.89) folded lens\/mirror catadioptric. The system's Maksutov corrector lens is fully coated on both sides with antireflection material for high light transmission and good contrast. A no-tool quick release dovetail connects the tube to the mount for fast set-up and take-down.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRed dot finder:\u003c\/strong\u003e StarPointer non-magnifying variable brightness red dot finder on a quick-release dovetail mounting bracket. The StarPointer is a quick and easy way to point your telescope exactly to the desired object in the sky. There's no need to worry about the inverted images you see through traditional finders. Just align the red dot seen in the StarPointer with the desired star in the sky and you're done.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 1.25\" 90° prism type\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo 1.25\" eyepieces:\u003c\/strong\u003e The first is a 25mm providing 50x. The eyepiece field of view is 1° across, twice the diameter of the full Moon for expansive views of the Moon, star clusters, and terrestrial observing. The second is a 9mm providing 139x for close-up views of the Moon and planets, globular star clusters, binary stars and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Telescope's Mount . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFork mount\/drive system:\u003c\/strong\u003e Single fork arm altazimuth design with pre-installed internal dual DC servo motor drives. A compartment in the drive base accepts eight user-supplied AA batteries for powering the telescope. Selectable lunar, solar, or sidereal (star) tracking rates, with nine different slewing and centering speeds for locating objects (3°\/sec, 2°\/sec, 1°\/sec, and 64x\/32x\/16x\/8x\/4x\/2x the sidereal rates). For more details, click on the \"SLT mount\" icon in the support tab above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNexStar computer control:\u003c\/strong\u003e The supplied computer hand control has an illuminated numeric keypad and a two-line 16-character LCD display. It has a database of 4,033 stars and objects, including the complete Messier and Caldwell catalogs of famous deep space objects; a selection of the brightest and best deep space objects from the Revised New General Catalog (NGC); selected SAO stars, including the best variable stars and multiple star systems; the planets; the Moon; and more.\u003c\/p\u003e\n\u003cp\u003eWith the built-in SkyAlign technology, lining up your 90SLT on the sky each night takes only minutes. Simply input the date, time, and your location into the computer hand control, then use the StarPointer red dot finder to align the telescope on any three bright stars, or to two stars and a bright planet or the Moon. The NexStar computer will automatically align itself with the sky. Then, it takes only a few keystrokes on the computer hand control to have the scope move automatically to your night's first observing target and start tracking it so you can observe at your leisure.\u003c\/p\u003e\n\u003cp\u003eYou can find hundreds of fascinating deep space objects your first night out, even if you have never used a telescope before. No matter what level of experience you start from, your NexStar SLT scope will unfold all the wonders of the Universe for you, your family, and your friends. For more details, click on the \"SLT computer\" icon above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdjustable height tripod:\u003c\/strong\u003e The preassembled tripod has stainless steel legs to damp vibrations quickly. The center leg brace holds a convenient no-tool quick-release accessory tray to keep your eyepieces and accessories up and out of the dew-soaked grass. The height adjustment lock levers are on the inside of the legs to avoid snagging your clothing on them in the dark.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo-year warranty:\u003c\/strong\u003e All Celestron telescopes have a two-year warranty, double that of competitive scopes.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e90mm (3.54\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e1250mm (49\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio:\u003c\/td\u003e\n\u003ctd\u003ef\/14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e25mm (0.98\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e50x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 2:\u003c\/td\u003e\n\u003ctd\u003e9mm (0.35\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 2:\u003c\/td\u003e\n\u003ctd\u003e139x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope:\u003c\/td\u003e\n\u003ctd\u003eStarPointer™ red dot finderscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal:\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e213x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e13x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude:\u003c\/td\u003e\n\u003ctd\u003e12.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh):\u003c\/td\u003e\n\u003ctd\u003e1.55 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes):\u003c\/td\u003e\n\u003ctd\u003e1.29 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye):\u003c\/td\u003e\n\u003ctd\u003e165x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View:\u003c\/td\u003e\n\u003ctd\u003e1°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLinear Field of View (@1000 yds):\u003c\/td\u003e\n\u003ctd\u003e53 ft (16 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings:\u003c\/td\u003e\n\u003ctd\u003eFully Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMOUNT INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type:\u003c\/td\u003e\n\u003ctd\u003eMotorized Altazimuth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Tray:\u003c\/td\u003e\n\u003ctd\u003eNo Tool, Quick release\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTripod:\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlew Speeds:\u003c\/td\u003e\n\u003ctd\u003eNine slew speeds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking Rates:\u003c\/td\u003e\n\u003ctd\u003eSidereal, Solar and Lunar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking Modes:\u003c\/td\u003e\n\u003ctd\u003eAlt-Az, EQ North and EQ South\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlignment Procedures:\u003c\/td\u003e\n\u003ctd\u003eSkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputer Hand Control:\u003c\/td\u003e\n\u003ctd\u003eFully Computerized \/ Flash Upgradeable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNexStar+ Database:\u003c\/td\u003e\n\u003ctd\u003e40,000 Object Database\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGPS:\u003c\/td\u003e\n\u003ctd\u003eOptional SkySync GPS Accessory (93969)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware:\u003c\/td\u003e\n\u003ctd\u003eCelestron Starry Night Special Edition Software and SkyPortal App\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Warning\u003c\/td\u003e\n\u003ctd class=\"solar-warning\"\u003e\n\u003cul class=\"solar-warning-text\"\u003e\n\u003cli\u003eNever look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.\u003c\/li\u003e\n\u003cli\u003eNever use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.\u003c\/li\u003e\n\u003cli\u003eNever leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalifornia Residents\u003c\/td\u003e\n\u003ctd class=\"cali-prop65-warning\"\u003e\n\u003cspan class=\"prop65-warning-content\"\u003e\u003cimg class=\"cali-warning\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/warning.png?10476927669983959391\"\u003e\u003c\/span\u003e\n\u003cp class=\"cali-warning-text\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCancer and Reproductive Harm -\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.p65warnings.ca.gov\/\" target=\"_blank\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40221669785673,"sku":"NS90SLT","price":599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/18623.jpg?v=1662967894"},{"product_id":"celestron-nexstar-127slt-127mm-go-to-altazimuth-maksutov-cassegrain","title":"Celestron NexStar 127 SLT 127mm Go-To Altazimuth Maksutov-Cassegrain Telescope  22097","description":"\u003cp\u003eThe NexStar 127SLT (Star Locating Telescope) is a big, but very affordable, go-to 5\" aperture Maksutov-Cassegrain with high contrast\/high resolution catadioptric optics that is priced far below competitive 5\" Maks.\u003c\/p\u003e\n\u003cp\u003eYou don't have to know how to read a star chart - or even know which way is North - to find your way around the sky with the Celestron NexStar 127SLT 127mm go-to Maksutov-Cassegrain. It has Celestron's famous SkyAlign easy alignment technology and a StarPointer red dot LED finder to make lining up on the sky a breeze.\u003c\/p\u003e\n\u003cp\u003eOnce aligned, the scope's computer hand control will find more than 4,000 celestial objects for you and will track them unerringly all night long while you observe. With its pre-assembled adjustable height steel tripod and easy no-tool assembly, the NexStar 127SLT can be up and ready to take you on a tour of the Universe in a matter of minutes.\u003c\/p\u003e\n\u003cp\u003eThe 127mm (5\") aperture Maksutov-Cassegrain folded catadioptric optical system of the NexStar 127SLT provides exceptional high contrast\/high resolution solar system images - the phases of Mercury; lunar rilles and craters less than three miles across; Martian polar caps and major dark surface features; cloud belts on Jupiter, with some detail in the belts, plus the shadows of Jupiter's moons on the planet during transits; Cassini's division in Saturn's rings on a regular basis, plus four or five of its moons; Uranus and Neptune visible as very small discs.\u003c\/p\u003e\n\u003cp\u003eOutside the solar system, the high resolution Celestron 127SLT will show you dozens of globular clusters, emission nebulas, planetary nebulas, and galaxies; all of the Messier objects and many of the brighter NGC objects from a dark sky site (with some internal detail visible in many nebulas, although most galaxies will remain relatively featureless hazy patches).\u003c\/p\u003e\n\u003cp\u003eThe NexStar 127SLT has all the features and optical performance needed to keep a casual backyard astronomer happily observing for years. And it can be used for terrestrial observing, too - birdwatching, scanning the scenery from the home with a view, and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Telescope's Optical System . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optical system:\u003c\/strong\u003e Aluminum tube 127mm aperture (1500mm focal length f\/11.81) folded lens\/mirror catadioptric. The system's Maksutov corrector lens is fully coated on both sides with antireflection material for high light transmission and good contrast. A no-tool quick release dovetail connects the tube to the mount for fast set-up and take-down.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRed dot finder:\u003c\/strong\u003e StarPointer non-magnifying variable brightness red dot finder on a quick-release dovetail mounting bracket. The StarPointer is a quick and easy way to point your telescope exactly to the desired object in the sky. There's no need to worry about the inverted images you see through traditional finders. Just align the red dot seen in the StarPointer with the desired star in the sky and you're done.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 1.25\" 90° prism type\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo 1.25\" eyepieces:\u003c\/strong\u003e The first is a 25mm providing 60x. The eyepiece field of view is 0.83° across, more than one and a half times the diameter of the full Moon for expansive views of the Moon, star clusters, and terrestrial observing. The second is a 9mm providing 197x for close-up views of the Moon and planets, globular star clusters, binary stars and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Telescope's Mount . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFork mount\/drive system:\u003c\/strong\u003e Single fork arm altazimuth design with pre-installed internal dual DC servo motor drives. A compartment in the drive base accepts eight user-supplied AA batteries for powering the telescope. Selectable lunar, solar, or sidereal (star) tracking rates, with nine different slewing and centering speeds for locating objects (3°\/sec, 2°\/sec, 1°\/sec, and 64x\/32x\/16x\/8x\/4x\/2x the sidereal rates). For more details, click on the \"SLT mount\" icon in the support tab above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNexStar computer control:\u003c\/strong\u003e The supplied computer hand control has an illuminated numeric keypad and a two-line 16-character LCD display. It has a database of 4,033 stars and objects, including the complete Messier and Caldwell catalogs of famous deep space objects; a selection of the brightest and best deep space objects from the Revised New General Catalog (NGC); selected SAO stars, including the best variable stars and multiple star systems; the planets; the Moon; and more.\u003cbr\u003e\u003cbr\u003eWith the built-in SkyAlign technology, lining up your 127SLT on the sky each night takes only minutes. Simply input the date, time, and your location into the computer hand control, then use the StarPointer red dot finder to align the telescope on any three bright stars, or to two stars and a bright planet or the Moon. The NexStar computer will automatically align itself with the sky. Then, it takes only a few keystrokes on the computer hand control to have the scope move automatically to your night's first observing target and start tracking it so you can observe at your leisure.\u003c\/p\u003e\n\u003cp\u003eYou can find hundreds of fascinating deep space objects your first night out, even if you have never used a telescope before. No matter what level of experience you start from, your NexStar SLT scope will unfold all the wonders of the Universe for you, your family, and your friends. For more details, click on the \"SLT computer\" icon in the support tab above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdjustable height tripod:\u003c\/strong\u003e The preassembled tripod has stainless steel legs to damp vibrations quickly. The center leg brace holds a convenient no-tool quick-release accessory tray to keep your eyepieces and accessories up and out of the dew-soaked grass. The height adjustment lock levers are on the inside of the legs to avoid snagging your clothing on them in the dark.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo-year warranty:\u003c\/strong\u003e All Celestron telescopes have a two-year warranty, double that of competitive scopes.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e127mm (5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e1500mm (59\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio:\u003c\/td\u003e\n\u003ctd\u003ef\/12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e25mm (0.98\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e60x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 2:\u003c\/td\u003e\n\u003ctd\u003e9mm (0.35\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 2:\u003c\/td\u003e\n\u003ctd\u003e167x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope:\u003c\/td\u003e\n\u003ctd\u003eStarPointer™ red dot finderscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal:\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube:\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e300x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e18x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude:\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh):\u003c\/td\u003e\n\u003ctd\u003e1.1 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes):\u003c\/td\u003e\n\u003ctd\u003e0.91 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye):\u003c\/td\u003e\n\u003ctd\u003e329x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings:\u003c\/td\u003e\n\u003ctd\u003eFully Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length:\u003c\/td\u003e\n\u003ctd\u003e381mm (15\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter:\u003c\/td\u003e\n\u003ctd\u003e146.05mm (5.75\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight:\u003c\/td\u003e\n\u003ctd\u003e8.7 lbs (3.95 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail:\u003c\/td\u003e\n\u003ctd\u003eCG-5 Dovetail bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMOUNT INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type:\u003c\/td\u003e\n\u003ctd\u003eComputerized Altitude-Azimuth Single Fork Arm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstrument load capacity:\u003c\/td\u003e\n\u003ctd\u003e8 lbs (3.6 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight adjustment range (includes mount and tripod):\u003c\/td\u003e\n\u003ctd\u003e762mm - 1270mm (30\" - 50\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTripod Leg Diameter:\u003c\/td\u003e\n\u003ctd\u003e31.75mm (1.25\") Stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Head Weight:\u003c\/td\u003e\n\u003ctd\u003e5 lbs (2.3kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Tray:\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTripod Weight:\u003c\/td\u003e\n\u003ctd\u003e5 lbs (2.3kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlew Speeds:\u003c\/td\u003e\n\u003ctd\u003e9 slew speeds - max speed 3°\/second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking Rates:\u003c\/td\u003e\n\u003ctd\u003eSidereal, Solar and Lunar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking Modes:\u003c\/td\u003e\n\u003ctd\u003eAlt-Az, EQ North and EQ South\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGPS:\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Compatibility:\u003c\/td\u003e\n\u003ctd\u003eCG-5 saddle plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Auxiliary Ports:\u003c\/td\u003e\n\u003ctd\u003e1x AUX Port and 1x hand control Port (hand control can use either Port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoguide Port:\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUSB Port:\u003c\/td\u003e\n\u003ctd\u003eYes, Input on hand control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirements:\u003c\/td\u003e\n\u003ctd\u003e12 VDC - 8xAA Batteries (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Drive:\u003c\/td\u003e\n\u003ctd\u003eDC Servo Motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlignment Procedures:\u003c\/td\u003e\n\u003ctd\u003eSkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System Align\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeriodic Error Correction:\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputerized Hand Control:\u003c\/td\u003e\n\u003ctd\u003e1 Hand Control Port and 1 AUX Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNexStar+ Database:\u003c\/td\u003e\n\u003ctd\u003eOver 40,000 including 220 of the best deep sky and solar system objects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware:\u003c\/td\u003e\n\u003ctd\u003eCelestron Starry Night Special Edition Software and SkyPortal App\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Kit Weight:\u003c\/td\u003e\n\u003ctd\u003eTBD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Items:\u003c\/td\u003e\n\u003ctd\u003eOptical Tube\u003cbr\u003eSingle Fork Arm Mount and Tripod\u003cbr\u003eAccessory Tray\u003cbr\u003eNexStar+ Hand Control\u003cbr\u003e20mm and 9mm eyepiece\u003cbr\u003eStarPointer™ red dot finderscope\u003cbr\u003eStar Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar Warning\u003c\/td\u003e\n\u003ctd class=\"solar-warning\"\u003e\n\u003cul class=\"solar-warning-text\"\u003e\n\u003cli\u003eNever look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.\u003c\/li\u003e\n\u003cli\u003eNever use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.\u003c\/li\u003e\n\u003cli\u003eNever leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalifornia Residents\u003c\/td\u003e\n\u003ctd class=\"cali-prop65-warning\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/products\/nexstar-127slt-computerized-telescope#\"\u003eView Proposition 65 Warning\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40221669949513,"sku":"NS127SLT","price":749.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/18624.jpg?v=1662967895"},{"product_id":"questar-field-model-90mm-53-80x-case","title":"Questar Field Model, 90mm Telescope, 53\/80x, Case","description":"\u003cp\u003eOne of our customers from Nebraska called up shortly after he received his Questar Field Model to say his scope clearly showed the power line into his neighbor's house. We didn't think that was all that impressive - until he told us his neighbor lived three miles away! As a review in \u003cem\u003eAudubon \u003c\/em\u003emagazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.)\u003c\/p\u003e\n\u003cp\u003eA Questar has no astigmatism or chromatic aberration - no optical problems of any kind - to detract from your enjoyment. The \u003cem\u003eAudubon \u003c\/em\u003ereview added, \"the Field Model is unrivalled as a catadioptric spotting scope. It sets the highest standards for both optical performance and convenience of use.\"\u003c\/p\u003e\n\u003cp\u003eA review in Cornell University's \u003cem\u003eLiving Bird \u003c\/em\u003emagazine said, \"The legendary Questar. There's no question that for the right application this is a fantastic scope.\"\u003c\/p\u003e\n\u003cp\u003eAnd just what is the right application? According to the \u003cem\u003eLiving Bird \u003c\/em\u003ereview, \"there are times when the Questar is indispensable. During the World Series of Birding, the Lab team spied a white blob on an old water tower. Rick put his trusty Bushnell Spacemaster on it at 22x - still a white blob. Kevin tried the Kowa TSN-4 at 60x and saw a white blob that might be a large bird. Finally Todd trained the Questar on it, flipped to 80x, and got a crystal-clear image of a roosting barn owl.\"\u003c\/p\u003e\n\u003cp\u003eWhat is the right application? It is any birding challenge where you need absolutely razor-sharp views of distant birds. The supplied standard equipment eyepiece gives you a basic 53x magnification. A built-in Barlow lens increases that power to 80x at the touch of your finger on a lever at the rear of the scope. Another lever instantly converts the 53x eyepiece to a 4x finder with an exceptionally wide 12 degree field of view (630' at 1000 yards). You never risk losing your subject as you move your eye from finder to eyepiece, because finder and eyepiece are one and the same. (Both provide erect but reversed mirror images.)\u003c\/p\u003e\n\u003cp\u003eFor those birders who prefer lower powers and a wider field for close-in birding, an optional 40x eyepiece is available that provides 60x when the built-in Barlow is used. With the optional 40x eyepiece in the eyepiece holder, the 4x finderscope magnification drops to 3x, but with an even wider field of view (14 degrees, which is a very wide 735' at 1000 yards). The 40x eyepiece can be substituted for the standard equipment 53x eyepiece at no extra cost, if the substitution is requested at the time your scope is ordered. The 40x eyepiece is also available for separate sale, to give you a total of four separate magnifications from only two eyepieces (using the scope's built-in Barlow lens to increase the power of each eyepiece). A rolldown rubber eyecup is provided on all eyepieces for eyeglass use, although eye relief is relatively limited at higher powers.\u003c\/p\u003e\n\u003cp\u003eBecause of its high power and its ability to focus as close as 8' (although with a very shallow depth of field at that close a distance), the Field Model is a marvelous long distance microscope for close-up studies of subjects that are too small or too dangerous or too fragile to examine at close hand - ant hills, bee hives, spider webs, etc. At its standard 53x magnification, subjects 10 feet away appear the same size as they would if you could get your eye within a mere 2.2\" of them, with a field only 1.8\" wide filling your eyepiece! Imagine your views of gape-mouthed chicks being fed in nearby nests, hummers at feeders, and more!\u003c\/p\u003e\n\u003cp\u003eThe black and satin-finished aluminum Field Model comes with a 3\/16\" thick machined thread-on metal protective dust cap. A slide-on metal lens shade improves both visual and photographic contrast. Other standard equipment includes a camera coupling set that lets you use the Field Model as a razor-sharp 1400mm (28x) f\/16 telephoto lens by adding an optional Questar brand P-thread T-ring to fit your particular camera body.\u003c\/p\u003e\n\u003cp\u003eThe Field Model has extremely precise 50-turn knob focusing. (We Questar owners soon learn to roll the side of our finger along the side of the focusing knob to speed up focus changes, rather than turn, turn, turn with our fingertips.) Faster-acting 24-turn focusing is available as a factory-installed option for more quickly tracking moving birds and wildlife (although at the cost of increasing the close focus distance to 25' from the standard 8').\u003c\/p\u003e\n\u003cp\u003eAn optional roof prism image erector, #6351, is available to allow straight-through viewing (from inside a car being used as a mobile blind, for example, using an optional car window mount). There is a loss of field when the image erector is used (from 54' down to 47' with the 40x eyepiece), the lever that changes from finder to a high power view is disabled, and you can only change powers by changing eyepieces, as the Barlow and finder optics are no longer in the optical path.\u003c\/p\u003e\n\u003cp\u003eLong-life aluminum mirror coatings and antireflection magnesium fluoride lens coatings are standard equipment for good light transmission and long life under adverse field conditions. However, a highly recommended option is the application of high transmission\/low reflection broadband multicoatings to the Field Model's objective lens during manufacture. This multicoatings package (on the Questar model #QFB) also includes a change in mirror surface material from aluminum to higher reflectivity silver. The broadband coatings package gives you a full 22% gain in light transmission and contrast that's very useful for twilight viewing and photography. An optional thermally-stable Zerodur ceramic mirror is available in place of the standard Pyrex mirror (in the Questar model #QFBZ) for critical photographic situations that don't allow focus changes during wide temperature swings. This is helpful for use in difficult locations such as the Arctic or Sahara, but is usually not needed in the continental United States or Hawaii, as well as in most of Canada.\u003c\/p\u003e\n\u003cp\u003eA foam-fitted waterproof hard case is standard equipment.\u003c\/p\u003e\n\u003cp\u003eThe Field Model has a ten-year Questar warranty (with a two-year warranty on the focuser mechanism).\u003c\/p\u003e\n\u003cp\u003eAs the review in \u003cem\u003eAudubon \u003c\/em\u003econcluded simply, \"Questar is superb.\" If you want the world's very best spotting scope, a Questar is it. Period. Case closed.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eArmored\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExit Pupil\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.7mm @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Relief\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eField of view 1000 yards\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e45' @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e11\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e53\/80x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNear Focus\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTwilight Factor\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e68.7 @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEyepiece\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1.5x Barlow and 4x finder\u003c\/li\u003e\n\u003cli\u003eLens shade\u003c\/li\u003e\n\u003cli\u003ecamera adapter\u003c\/li\u003e\n\u003cli\u003eDust covers\u003c\/li\u003e\n\u003cli\u003eHard case\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221674799177,"sku":"QF","price":3795.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/19594.jpg?v=1662968055"},{"product_id":"questar-field-model-90mm-broadband-coatings-53-80x-case","title":"Questar Field Model, 90mm Reflector Telescope, Broadband Coatings, 53\/80x, Case","description":"\u003cp\u003eFor absolutely exquisite and detailed long distance observing, no scope beats the images of this \"legendary\" Questar Field Model with broadband optical coatings . . .\u003c\/p\u003e\n\u003cp\u003eOne of our customers from Nebraska called up shortly after he received his Field Model to say his scope clearly showed the power line into his neighbor's house. We didn't think that was all that impressive - until he told us his neighbor lived three miles away! As a review in \u003cem\u003eAudubon \u003c\/em\u003emagazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (The exclamation point is theirs.)\u003c\/p\u003e\n\u003cp\u003eA Questar has no astigmatism or chromatic aberration - no optical problems of any kind - to detract from your enjoyment. The \u003cem\u003eAudubon \u003c\/em\u003ereview added, \"the Field Model is unrivalled as a catadioptric spotting scope. It sets the highest standards for both optical performance and convenience of use.\"\u003c\/p\u003e\n\u003cp\u003eA review in Cornell University's \u003cem\u003eLiving Bird \u003c\/em\u003emagazine said, \"The legendary Questar. There's no question that for the right application this is a fantastic scope.\"\u003c\/p\u003e\n\u003cp\u003eAnd just what is the right application? According to the \u003cem\u003eLiving Bird \u003c\/em\u003ereview, \"there are times when the Questar is indispensable. During the World Series of Birding, the Lab team spied a white blob on an old water tower. Rick put his trusty Bushnell Spacemaster on it at 22x - still a white blob. Kevin tried the Kowa TSN-4 at 60x and saw a white blob that might be a large bird. Finally Todd trained the Questar on it, flipped to 80x, and got a crystal-clear image of a roosting barn owl.\"\u003c\/p\u003e\n\u003cp\u003eWhat is the right application? It is any birding challenge where you need absolutely razor-sharp views of distant birds. The supplied standard equipment eyepiece gives you a basic 53x magnification. A built-in Barlow lens increases that power to 80x at the touch of your finger on a lever at the rear of the scope. Another lever instantly converts the 53x eyepiece to a 4x finder with an exceptionally wide 12 degree field of view (630' at 1000 yards). You never risk losing your subject as you move your eye from finder to eyepiece, because finder and eyepiece are one and the same. (Both provide erect but reversed mirror images.)\u003c\/p\u003e\n\u003cp\u003eFor those birders who prefer lower powers and a wider field for close-in birding, an optional 40x eyepiece is available that provides 60x when the built-in Barlow is used. With the optional 40x eyepiece in the eyepiece holder, the 4x finderscope magnification drops to 3x, but with an even wider field of view (14 degrees, which is a very wide 735' at 1000 yards). The 40x eyepiece can be substituted for the standard equipment 53x eyepiece at no extra cost, if the substitution is requested at the time your scope is ordered. The 40x eyepiece is also available for separate sale, to give you a total of four separate magnifications from only two eyepieces (using the scope's built-in Barlow lens to increase the power of each eyepiece). A rolldown rubber eyecup is provided on all eyepieces for eyeglass use, although eye relief is relatively limited at higher powers.\u003c\/p\u003e\n\u003cp\u003eBecause of its high power and its ability to focus as close as 8' (although with a very shallow depth of field at that close a distance), the Field Model is a marvelous long distance microscope for close-up studies of subjects that are too small or too dangerous or too fragile to examine at close hand - ant hills, bee hives, spider webs, etc. At its standard 53x magnification, subjects 10 feet away appear the same size as they would if you could get your eye within a mere 2.2\" of them, with a field only 1.8\" wide filling your eyepiece! Imagine your views of gape-mouthed chicks being fed in nearby nests, hummers at feeders, and more!\u003c\/p\u003e\n\u003cp\u003eThe black and satin-finished aluminum Field Model comes with a 3\/16\" thick machined thread-on metal protective dust cap. A slide-on metal lens shade improves both visual and photographic contrast. Other standard equipment includes a camera coupling set that lets you use the Field Model as a razor-sharp 1400mm (28x) f\/16 telephoto lens by adding an optional Questar brand P-thread T-ring to fit your particular camera body.\u003c\/p\u003e\n\u003cp\u003eThe Field Model has extremely precise 50-turn knob focusing. (We Questar owners soon learn to roll the side of our finger along the side of the focusing knob to speed up focus changes, rather than turn, turn, turn with our fingertips.) Faster-acting 24-turn focusing is available as a factory-installed option for more quickly tracking moving birds and wildlife (although at the cost of increasing the close focus distance to 25' from the standard 8').\u003c\/p\u003e\n\u003cp\u003eAn optional roof prism image erector, #6351, is available to allow straight-through viewing (from inside a car being used as a mobile blind, for example, using an optional car window mount). There is a loss of field when the image erector is used (from 54' down to 47' with the 40x eyepiece), the lever that changes from finder to a high power view is disabled, and you can only change powers by changing eyepieces, as the Barlow and finder optics are no longer in the optical path.\u003c\/p\u003e\n\u003cp\u003eThis broadband coated version has high transmission\/low reflection broadband optical multicoatings on its objective lens, rather than the standard Field Model's single layer magnesium fluoride antireflection lens coatings. In addition, the mirrors are coated with high reflectivity silver, rather than the aluminum coatings of the standard Field Model. Compared to the standard #QF Field Model, this broadband multicoated version gives you a full 22% higher light transmission and increased contrast that's very useful for twilight viewing and photography. Broadband coatings are not recommended for those who live full time at the seashore, however, as a constant exposure to salt air can cause the silver mirror coatings to deteriorate. Occasional exposure to salt sea air on vacations or field trips is not a problem.\u003c\/p\u003e\n\u003cp\u003eA specialized option worth considering is the addition of a thermally-stable Zerodur ceramic mirror in place of this model's Pyrex mirror for critical photographic situations that don't allow focus changes during wide temperature swings. (If the temperature differential between indoors and outdoors is 30 degrees to 40 degrees Fahrenheit or more, occasional minor refocusing will be required with the standard Field Model and this broadband coated version as their Pyrex mirrors gradually cool down to reach the outdoor air temperature.) The Zerodur mirror of Questar Field Model #QFBZ eliminates such minor refocusing in the Arctic or Sahara, but is usually not needed in the continental United States or Hawaii, as well as in most of Canada.\u003c\/p\u003e\n\u003cp\u003eA foam-fitted waterproof hard case is standard equipment.\u003c\/p\u003e\n\u003cp\u003eThis Field Model with broadband coatings has a ten-year warranty (with a two-year warranty on the focuser mechanism and a five-year warranty on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAs the review in \u003cem\u003eAudubon \u003c\/em\u003econcluded simply, \"Questar is superb.\" If you want an absolutely outstanding high power spotting scope, this Questar Field Model with broadband coatings is it. Period. Case closed.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eArmored\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExit Pupil\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.7mm @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Relief\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eField of view 1000 yards\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e45' @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e11\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e53\/80x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNear Focus\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTwilight Factor\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e68.7 @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh transmission\/low reflection broadband multicoatings\u003c\/li\u003e\n\u003cli\u003eEyepiece\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1.5x Barlow and 4x finder\u003c\/li\u003e\n\u003cli\u003eLens shade\u003c\/li\u003e\n\u003cli\u003eCamera adapter\u003c\/li\u003e\n\u003cli\u003eDust covers\u003c\/li\u003e\n\u003cli\u003eHard case\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221674831945,"sku":"QFB","price":4195.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/19595.jpg?v=1662968058"},{"product_id":"questar-field-model-90mm-broadband-coatings-zerodur-mirror-53-80x-case","title":"Questar Field Model, 90mm, Broadband Coatings, Zerodur Mirror, 53\/80x, Case","description":"\u003cp\u003eWith all due respect to the other spotting scopes shown on this site, there can only be one \"best spotting scope in the world.\" This Questar Field Model is it . . .\u003c\/p\u003e\n\u003cp\u003eWith all due respect to the other spotting scopes shown on this site, there can only be one \"best spotting scope in the world.\" This Questar Field Model with Broadband coatings and a Zerodur mirror is it. Its resolution is truly remarkable, exceeding the theoretical limits for a 3.5\" aperture scope. While optical theory predicts 0.33\" resolution at a distance of half a mile, a Questar can routinely resolve much thinner bicycle spokes at the same distance, and show you leaf stems at a distance of one mile!\u003c\/p\u003e\n\u003cp\u003eOne of our customers from Nebraska called up shortly after he received his Field Model to say his scope clearly showed the power line into his neighbor's house. We didn't think that was all that impressive - until he told us his neighbor lived three miles away! As a review in \u003cem\u003eAudubon \u003c\/em\u003emagazine noted, \"Brighter than reality, the Questar has unbelievably sharp resolution and an extremely flat field. It shows every feather from a half-mile away!\" (Exclamation point theirs.)\u003c\/p\u003e\n\u003cp\u003eA Questar has no astigmatism or chromatic aberration - no optical problems of any kind - to detract from your enjoyment. The \u003cem\u003eAudubon \u003c\/em\u003ereview added, \"the Field Model is unrivalled as a catadioptric spotting scope. It sets the highest standards for both optical performance and convenience of use.\"\u003c\/p\u003e\n\u003cp\u003eA review in Cornell University's \u003cem\u003eLiving Bird \u003c\/em\u003emagazine said, \"The legendary Questar. There's no question that for the right application this is a fantastic scope.\"\u003c\/p\u003e\n\u003cp\u003eAnd just what is the right application? According to the \u003cem\u003eLiving Bird \u003c\/em\u003ereview, \"there are times when the Questar is indispensable. During the World Series of Birding, the Lab team spied a white blob on an old water tower. Rick put his trusty Bushnell Spacemaster on it at 22x - still a white blob. Kevin tried the Kowa TSN-4 at 60x and saw a white blob that might be a large bird. Finally Todd trained the Questar on it, flipped to 80x, and got a crystal-clear image of a roosting barn owl.\"\u003c\/p\u003e\n\u003cp\u003eWhat is the right application? It is any birding challenge where you need absolutely razor-sharp views of distant birds. The supplied standard equipment eyepiece gives you a basic 53x magnification. A built-in Barlow lens increases that power to 80x at the touch of your finger on a lever at the rear of the scope. Another lever instantly converts the 53x eyepiece to a 4x finder with an exceptionally wide 12 degree field of view (630' at 1000 yards). You never risk losing your subject as you move your eye from finder to eyepiece, because finder and eyepiece are one and the same. (Both provide erect but reversed mirror images.)\u003c\/p\u003e\n\u003cp\u003eFor those birders who prefer lower powers and a wider field for close-in birding, an optional 40x eyepiece is available that provides 60x when the built-in Barlow is used. With the optional 40x eyepiece in the eyepiece holder, the 4x finderscope magnification drops to 3x, but with an even wider field of view (14 degrees, which is a very wide 735' at 1000 yards). The 40x eyepiece can be substituted for the standard equipment 53x eyepiece at no extra cost, if the substitution is requested at the time your scope is ordered. The 40x eyepiece is also available for separate sale, to give you a total of four separate magnifications from only two eyepieces (using the scope's built-in Barlow lens to increase the power of each eyepiece). A rolldown rubber eyecup is provided on all eyepieces for eyeglass use, although eye relief is relatively limited at higher powers.\u003c\/p\u003e\n\u003cp\u003eBecause of its high power and its ability to focus as close as 8' (although with a very shallow depth of field at that close a distance), the Field Model is a marvelous long distance microscope for close-up studies of subjects that are too small or too dangerous or too fragile to examine at close hand - ant hills, bee hives, spider webs, etc. At its standard 53x magnification, subjects 10 feet away appear the same size as they would if you could get your eye within a mere 2.2\" of them, with a field only 1.8\" wide filling your eyepiece! Imagine your views of gape-mouthed chicks being fed in nearby nests, hummers at feeders, and more!\u003c\/p\u003e\n\u003cp\u003eThe black and satin-finished aluminum Field Model comes with a 3\/16\" thick machined thread-on metal protective dust cap. A slide-on metal lens shade improves both visual and photographic contrast. Other standard equipment includes a camera coupling set that lets you use the Field Model as a razor-sharp 1400mm (28x) f\/16 telephoto lens by adding an optional Questar brand P-thread T-ring to fit your particular camera body.\u003c\/p\u003e\n\u003cp\u003eThe Field Model has extremely precise 50-turn knob focusing. (We Questar owners soon learn to roll the side of our finger along the side of the focusing knob to speed up focus changes, rather than turn, turn, turn with our fingertips.) Faster-acting 24-turn focusing is available as a factory-installed option for more quickly tracking moving birds and wildlife (although at the cost of increasing the close focus distance to 25' from the standard 8').\u003c\/p\u003e\n\u003cp\u003eAn optional roof prism image erector, #6351, is available to allow straight-through viewing (from inside a car being used as a mobile blind, for example, using an optional car window mount). There is a loss of field when the image erector is used (from 54' down to 47' with the 40x eyepiece), the lever that changes from finder to a high power view is disabled, and you can only change powers by changing eyepieces, as the Barlow and finder optics are no longer in the optical path.\u003c\/p\u003e\n\u003cp\u003eThis broadband coated version has high transmission\/low reflection broadband multicoatings on its objective lens, rather than the standard Field Model's single layer magnesium fluoride antireflection lens coatings. In addition, the mirrors are coated with high reflectivity silver, rather than the aluminum coatings of the standard Field Model. Compared to the standard #QF Field Model, this broadband multicoated version gives you a full 22% higher light transmission and increased contrast that's very useful for twilight viewing and photography. Broadband coatings are not recommended for those who live full time at the seashore, however, as a constant exposure to salt air can cause the silver mirror coatings to deteriorate. Occasional exposure to salt sea air on vacations or field trips is not a problem.\u003c\/p\u003e\n\u003cp\u003eIn addition, a thermally-stable Zerodur ceramic mirror is used in place of the standard model's Pyrex mirror for critical photographic situations that don't allow focus changes during wide temperature swings. (If the temperature differential between indoors and outdoors is 30 degrees to 40 degrees Fahrenheit or more, occasional minor refocusing will be required with the standard Field Model as its Pyrex mirror gradually cools down to reach the outdoor air temperature.) A Zerodur mirror eliminates such minor refocusing in the Arctic or Sahara, but is usually not needed in the continental United States or Hawaii, as well as in most of Canada.\u003c\/p\u003e\n\u003cp\u003eA foam-fitted waterproof hard case is standard equipment.\u003c\/p\u003e\n\u003cp\u003eThe Field Model has a ten-year Questar warranty (with a two-year warranty on the focuser mechanism and a five-year warranty on the broadband coatings).\u003c\/p\u003e\n\u003cp\u003eAs the review in \u003cem\u003eAudubon \u003c\/em\u003econcluded simply, \"Questar is superb.\" If you want the world's very best spotting scope, this Questar Field Model with broadband coatings and a Zerodur mirror is it. Period. Case closed.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eArmored\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExit Pupil\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.7mm @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Relief\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eField of view 1000 yards\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e46' @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e11\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e53\/80x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNear Focus\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTwilight Factor\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e68.7 @ 53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh transmission\/low reflection broadband multicoatings\u003c\/li\u003e\n\u003cli\u003eLow expansion Zerodur ceramic mirror\u003c\/li\u003e\n\u003cli\u003eEyepiece\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1.5x Barlow and 4x finder\u003c\/li\u003e\n\u003cli\u003eLens shade\u003c\/li\u003e\n\u003cli\u003eCamera adapter\u003c\/li\u003e\n\u003cli\u003eDust covers\u003c\/li\u003e\n\u003cli\u003eHard case\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Questar","offers":[{"title":"Default Title","offer_id":40221674897481,"sku":"QFBZ","price":4595.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/19596.jpg?v=1662968060"},{"product_id":"celestron-c90-maksutov-spotting-scope-90mm-1-25-38x-photo-tripod-mounting-block","title":"Celestron C90 Maksutov Spotting Scope, 90mm, 1.25\" 38x, Photo Tripod Mounting Block","description":"\u003cp\u003eThis Celestron spotting scope puts good quality Maksutov-Cassegrain optics for long-distance observing (both terrestrial and astronomical) into a compact and lightweight body that's easy to use in the field.\u003c\/p\u003e\n\u003cdiv class=\"heading\"\u003e\u003cstrong\u003eThis Celestron spotting scope has:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"heading\"\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"heading\"\u003e• 90mm f\/13.3 Maksutov-Cassegrain optics \u003cbr\u003e• 45° viewing angle diagonal (eyepiece holder) \u003cbr\u003e• upright\/right-reading images suitable for both terrestrial and astronomical use \u003cbr\u003e• 8 x 21mm erect image finderscope \u003cbr\u003e• built-in T-threads for easy 35mm or DSLR camera attachment \u003cbr\u003e• 32mm Plössl eyepiece (38x)\u003c\/div\u003e\n\u003cdiv class=\"heading\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eLike all Maksutov optics spotting scopes, such as the ultra-premium Questars, the Celestron C90 is exceptional for observing anything that is small and distant and needs a lot of power to resolve clearly. It provides sharp, high contrast images of distant birds and wildlife, details that are free from the distracting spurious color you'll find in comparably-priced achromatic refractor spotters. Optically very nice, this Celestron 90mm Maksutov has the optical performance to keep you busy observing the land and sky for many years to come.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this Celestron spotting scope . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optics:\u003c\/strong\u003e 3.5\" (90mm) aperture, 1200mm focal length, f\/13.3 multicoated optical system. The 11\" long optical tube weighs only 3.1 lbs with finderscope and eyepiece attached.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMulticoated optics:\u003c\/strong\u003e The system's Maksutov corrector lens is fully coated on both sides with multiple layers of antireflection materials for high light transmission and good contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClose focusing:\u003c\/strong\u003e Twenty turns of the slow, but very precise, focusing knob of the C90 moves the focus from the horizon down to a very close 20'. This is not as great a burden as it might first seem, as only a few turns of the knob in the middle of its rotation range will cover most of the medium to long distance observing situations the C90 is designed for. However, the relatively slow multi-turn focusing makes the C90 more suitable for observing stationary targets from distant locations, rather than trying to follow fast-moving birds in flight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eErect image eyepiece holder:\u003c\/strong\u003e Unlike conventional 90° star diagonals (eyepiece holders) that reverse the image, the supplied 45° viewing angle erect image 1.25\" diagonal provides correctly-oriented images that are identical to what you see with your unaided eye (upright and correctly oriented left-to-right so that printing is correctly oriented and readable and you can easily follow subjects in motion).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEyepiece:\u003c\/strong\u003e Fully multicoated 1.25\" 32mm (38x) Plössl eyepiece with a 1.4° field of view (73' at 1000 yards). While this Celestron C90 Mak has excellent optics with sharp images, its field of view is somewhat narrow, due to the scope's long focal length. However, the narrow field is entirely in keeping with the primary task of the scope, that of long distance observing. The eyepiece has a usable eye relief of 18mm for eyeglass use. In addition, any of nearly 200 different 1.25\" astronomical eyepieces can be used with the C90, giving exceptional flexibility in choosing observing magnifications. For example, the optional Celestron 8mm to 24mm zoom eyepiece listed below provides very flexible viewing, with a zoom range of 50x to 150x, allowing you to instantly modify the magnification to suit the target distance and lighting conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinderscope:\u003c\/strong\u003e 8 x 21mm straight-through crosshair design with erect right-reading images that give you the same image orientation you see with your unaided eye. Three collimating screws let you line up the finder crosshairs precisely with the center of the eyepiece field. The finderscope must be removed from the scope before the scope is stored in its case, but a quick-release dovetail bracket makes removing the finder just a matter of seconds. The finder can be reinstalled on the scope just as quickly, and the dovetail bracket system assures that the finder will be properly lined up with the main optics once in place on the scope. The finderscope eye relief is quite short at 8mm. It will severely vignette the field of view for eyeglass wearers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTripod adapter:\u003c\/strong\u003e The scope has a mounting shoe with two standard 1\/4\"-20 thread mounting holes to let you use it on any suitable heavy duty photo tripod. The front hole is for visual use. The rear hole will help better balance the scope on the tripod when a camera is attached for terrestrial photography.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt-in camera adapter:\u003c\/strong\u003e The star diagonal holder threaded onto the Cassegrain focus at the rear of the scope has standard T-threads built in that allow you to connect a 35mm or DSLR camera to the scope by simply adding an inexpensive optional T-ring to fit your camera. This converts the C90M to a very high power 1200mm focal length (24x) f\/13.3 telephoto lens for long distance terrestrial nature photography. Such high magnification requires the use of a very sturdy photographic tripod for the sharpest images.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCarry case:\u003c\/strong\u003e Nylon backpack style carrying case.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eArmored\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExit Pupil\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2.41mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye Relief\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e18mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eField of view 1000 yards\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e73'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e11\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e38x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNear Focus\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e20'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePhotographic Focal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/13.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTwilight Factor\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e58.48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eLimited Lifetime\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSoft case\u003c\/li\u003e\n\u003cli\u003e8 x 21mm erect image finderscope\u003c\/li\u003e\n\u003cli\u003e45° image erecting diagonal and 90° viewing port\u003c\/li\u003e\n\u003cli\u003e32mm 1.25\" Plössl eyepiece (38x)\u003c\/li\u003e\n\u003cli\u003eFlip-down lens cover\u003c\/li\u003e\n\u003cli\u003eEyepiece holder covers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40221675257929,"sku":"C90M","price":279.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/19623.jpg?v=1662968074"},{"product_id":"sky-watcher-skymax-102-102mm-f-12-75-maksutov-cassegrain-optical-tube","title":"Sky-Watcher Skymax 102 102mm f\/12.75 Maksutov-Cassegrain Optical Tube S11510","description":"\u003cp\u003eThe Sky-Watcher 102mm Maksutov-Cassegrain is an inexpensive step up from a 90mm Mak. This compact optical powerhouse is capable of producing sharp, high contrast images inside the solar system and out.\u003c\/p\u003e\n\u003cp\u003eThis 102mm (4\") Sky-Watcher Maksutov-Cassegrain is an inexpensive step-up from a 90mm Maksutov. It costs less than 20% more than a 90mm Mak, but has 30% more light gathering. Resolution of the 102mm is 14% higher than a 90mm Mak, as well.\u003c\/p\u003e\n\u003cp\u003eLike all Maksutov-Cassegrain telescopes, such as the ultra-premium Questars, the 102mm Sky-Watcher is designed for observing anything that is small and distant and needs a lot of power to resolve clearly. Its Maksutov-Cassegrain folded optical system provides sharp, high contrast images - mountains and craters on the Moon; major surface details on Mars; multiple storm bands on Jupiter; even Cassini's Division in the rings of Saturn occasionally pops into view in good seeing conditions.\u003c\/p\u003e\n\u003cp\u003eOutside the solar system, the high resolution 102mm Sky-Watcher splits close binary stars, resolves open star clusters, begins to reveal the brighter nebulas and galaxies, and more. It can also be used as a very high performance terrestrial spotting scope.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this 102mm Sky-Watcher Maksutov-Cassegrain . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optics:\u003c\/strong\u003e 4\" (102mm) aperture, 1300mm focal length, f\/12.75 optical system. The system's Maksutov corrector lens is fully multi-coated on both sides with multiple layers of anti-reflection materials for high light transmission and good contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 1.25\" 90°.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo 1.25\" eyepieces:\u003c\/strong\u003e The first is a 25mm Plössl providing 52x. The eyepiece field of view is nearly 1° across, twice the diameter of the full Moon, for expansive views of the Moon, star clusters, and terrestrial observing. The second is a 10mm Plössl providing 130x for close-up views of the Moon and planets, globular star clusters, binary stars and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinder:\u003c\/strong\u003e illuminated red dot finder. The red dot finder is a quick and easy way to point your telescope exactly to the desired object in the sky. There's no need to worry about the inverted images you see through traditional finders. Just align the red dot seen in the finder with the desired object and you're done.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDovetail:\u003c\/strong\u003e Vixen-style dovetail for installing the scope on any altazimuth or equatorial mount that uses a Vixen-style saddle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e two years.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/12.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e6 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e186x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e6 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.14 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eS11510\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMak-Cass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7\/Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrue Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e101.93\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e102\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd\u003e12.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length (mm)\u003c\/td\u003e\n\u003ctd\u003e1300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e31mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e30%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction by Area\u003c\/td\u003e\n\u003ctd\u003e9%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eObservational Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e1.14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e1.37\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Mag.\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering (compared to next size down)\u003c\/td\u003e\n\u003ctd\u003e28%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGeneral Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrimary Mirror\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length (Retract\/Ext.)\u003c\/td\u003e\n\u003ctd\u003e12.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e4.625\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessories\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finder\u003c\/td\u003e\n\u003ctd\u003eRed Dot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Accessories\u003c\/td\u003e\n\u003ctd\u003eV-Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepieces\u003c\/td\u003e\n\u003ctd\u003e25\/10 Wide Angle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification w\/ Included Eyepieces\u003c\/td\u003e\n\u003ctd\u003e52x\/130x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Case\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":40481978908745,"sku":"S11510","price":355.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/Skymax102_Main_1800x1800_485b8365-ea29-4380-9a81-7f4a60ac0f44.webp?v=1723143248"},{"product_id":"sky-watcher-skymax-127-127mm-f-11-8-maksutov-cassegrain-optical-tube","title":"Sky-Watcher Skymax 127  f\/11.8 Maksutov-Cassegrain Optical Tube","description":"\u003cp\u003eThe Sky-Watcher 127mm Maksutov-Cassegrain folded optical system is a compact optical powerhouse capable of producing sharp, high contrast images inside the solar system and out.\u003c\/p\u003e\n\u003cp\u003eThis 127mm (5\") aperture Sky-Watcher Maksutov-Cassegrain provides exceptional high contrast\/high resolution solar system images at a very sensible price. You can see the phases of Mercury and Venus; lunar rilles and craters less than three miles across; Martian polar caps and major dark surface features; cloud belts on Jupiter, with some detail in the belts, plus the shadows of Jupiter's moons on the planet during transits; Cassini's division in Saturn's rings on a regular basis, plus four or five of its moons; and Uranus and Neptune visible as very small discs.\u003c\/p\u003e\n\u003cp\u003eOutside the solar system, the high resolution 127mm Sky-Watcher will show you dozens of globular clusters, emission nebulas, planetary nebulas, and galaxies; all of the Messier objects and many of the brighter NGC objects from a dark sky site (with some internal detail visible in many nebulas, although most galaxies will remain relatively featureless hazy patches). It can also be used as a very high performance terrestrial spotting scope.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this 127mm Sky-Watcher Maksutov-Cassegrain . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optics:\u003c\/strong\u003e 5\" (127mm) aperture, 1500mm focal length, f\/11.8 optical system. The system's Maksutov corrector lens is fully multi-coated on both sides with multiple layers of anti-reflection materials for high light transmission and good contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 2\" 90° mirror type.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2\" eyepiece:\u003c\/strong\u003e The 2\" 54x eyepiece is a fully multi-coated three-element Sky-Watcher 28mm LET design with a long 20mm eye relief and a twist-up eyecup. The eyepiece field of view is little over 1° across, more than twice the diameter of the full Moon, for expansive views of the Moon, nebulas, and globular star clusters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinder:\u003c\/strong\u003e 6 x 30mm straight-through dark crosshair achromatic refractor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDovetail:\u003c\/strong\u003e Vixen-style dovetail for installing the scope on any altazimuth or equatorial mount that uses a Vixen-style saddle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e two years.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1500mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/11.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e250x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e9.7 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.91 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eS11520\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115209\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMak-Cass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7\/Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd\u003e12.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length (mm)\u003c\/td\u003e\n\u003ctd\u003e1540\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e39mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e31%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction by Area\u003c\/td\u003e\n\u003ctd\u003e9%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eObservational Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.91\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e1.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Mag.\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering (compared to next size down)\u003c\/td\u003e\n\u003ctd\u003e55%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGeneral Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrimary Mirror\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length (Retract\/Ext.)\u003c\/td\u003e\n\u003ctd\u003e15\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e5.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e9.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessories\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finder\u003c\/td\u003e\n\u003ctd\u003e6x30 Finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Accessories\u003c\/td\u003e\n\u003ctd\u003eV-Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepieces\u003c\/td\u003e\n\u003ctd\u003e28 LET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification w\/ Included Eyepieces\u003c\/td\u003e\n\u003ctd\u003e55x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Case\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":40481978941513,"sku":"S11520","price":610.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/RS1356_S11520_Skymax127_OTAOnly_Front_NoBackground-scr_1800x1800_f2f42e0b-d20b-4f7a-a26d-4e8c55a43d37.webp?v=1723145376"},{"product_id":"sky-watcher-skymax-150-150mm-f-12-maksutov-cassegrain-optical-tube","title":"Sky-Watcher Skymax 150 150mm f\/12 Maksutov-Cassegrain Optical Tube S11530","description":"\u003cp\u003eThe Sky-Watcher 150mm (5.9\") Maksutov-Cassegrain folded optical system is a compact optical powerhouse capable of producing sharp, high contrast images inside the solar system and out. And it does it all at a surprisingly reasonable price.\u003c\/p\u003e\n\u003cp\u003eThis 150mm (5.9\") aperture Sky-Watcher Maksutov-Cassegrain uses quality Schott optical glass, from the premier German optical glass manufacturer, for exceptional high contrast\/high resolution images. Within the solar system you will see domes, rilles, and craters on the Moon that are less than two miles across; many dark Martian surface features, even during less than favorable oppositions; festoons, streamers, and increased detail in Jupiter's cloud belt under good seeing conditions; subtle banding in Saturn's atmosphere; and many faint comets and asteroids.\u003c\/p\u003e\n\u003cp\u003eOutside the solar system, the high resolution 150mm Sky-Watcher will split binary stars separated by as little as one arc second during very good seeing; show you hundreds of star clusters, nebulas, and galaxies, with hints of spiral structure visible in some galaxies; and reveal many NGC and IC objects from a dark sky site, with considerable detail visible in the nebulas and star clusters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this 150mm Sky-Watcher Maksutov-Cassegrain . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optics:\u003c\/strong\u003e 5.9\" (150mm) aperture, 1800mm focal length, f\/12 optical system using premium Schott optical glass. The system's Maksutov corrector lens is fully multi-coated on both sides with multiple layers of anti-reflection materials for high light transmission and good contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 2\" 90° mirror type.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2\" eyepiece:\u003c\/strong\u003e The 64x eyepiece is a fully multi-coated three-element Sky-Watcher 28mm LET with a long 20mm eye relief and a twist-up eyecup. The eyepiece field of view is 0.875° across, one and three quarter times the diameter of the full Moon, for expansive views of the Moon, nebulas, and globular star clusters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinder:\u003c\/strong\u003e 8 x 50mm straight-through dark crosshair achromatic refractor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDovetail:\u003c\/strong\u003e Vixen-style dovetail bar for installing the scope on any altazimuth or equatorial mount using a Vixen-style saddle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e two years.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5.9\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1800mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e300x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e14 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.77 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":40481978974281,"sku":"S11530","price":975.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/Skymax150_Main_1800x1800_a5924b55-6fda-4fbe-8fca-e70c3f6c5715.webp?v=1723145782"},{"product_id":"sky-watcher-skymax-180-180mm-f-15-maksutov-cassegrain-optical-tube","title":"Sky-Watcher Skymax 180 180mm f\/15 Maksutov-Cassegrain Optical Tube  S11540","description":"\u003cp\u003eThe Sky-Watcher 180mm Maksutov-Cassegrain folded optical system comes close in optical performance to the best-known ultra-premium 7\" Maksutov, but at less than 15% the price.\u003c\/p\u003e\n\u003cp\u003eAmong Maksutov-Cassegrain telescopes, none is more revered by optical purists than the ultra-premium 7\" Questars. Their only drawback is a price that starts at over $9000.\u003c\/p\u003e\n\u003cp\u003eGranted, this 180mm (7\") Sky-Watcher Maksutov-Cassegrain is not quite the performance equal of a 7\" Questar, but it's in the optical ballpark in side-by-side comparisons at less than 15% of the typical 7\" Questar price.\u003c\/p\u003e\n\u003cp\u003eThis 180mm (7\") aperture Sky-Watcher Maksutov-Cassegrain uses quality Schott optical glass, from the premier German optical glass manufacturer, for exceptional high contrast\/high resolution images. Within the solar system you will see lunar features under one mile across; large clouds and dust storms on Mars; as many as six or seven of Saturn's moons; Jupiter's four Galilean moons start to show as tiny discs at high powers; many dimmer asteroids become visible as faint star-like points; and seeing conditions start to limit how much solar system detail you can see on an average night\u003c\/p\u003e\n\u003cp\u003eOutside the solar system, the high resolution 180mm Sky-Watcher Maksutov will split binary stars separated by less than one arc second during very good seeing; some globular clusters will be resolved almost to the core, and there will be much internal detail in nebulas and some visible structure in many galaxies from a dark sky site.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this 180mm Sky-Watcher Maksutov-Cassegrain . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optics:\u003c\/strong\u003e 7\" (180mm) aperture, 2700mm focal length, f\/15 optical system using premium Schott optical glass. The system's Maksutov corrector lens is fully multi-coated on both sides with multiple layers of anti-reflection materials for high light transmission and good contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 2\" 90° mirror type.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2\" eyepiece:\u003c\/strong\u003e The 96x eyepiece is a fully multi-coated three-element Sky-Watcher 28mm LET with a long 20mm eye relief and a twist-up eyecup. The eyepiece field of view is 0.58° across, a little larger than the diameter of the full Moon, for expansive views of the Moon, compact nebulas, and globular star clusters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinder:\u003c\/strong\u003e 8 x 50mm straight-through dark crosshair achromatic refractor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDovetail:\u003c\/strong\u003e Vixen-style dovetail bar for installing the scope on any altazimuth or equatorial mount using a Vixen-style saddle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e two years.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2700mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e338x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e17.2 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.64 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eS11540\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115407\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMak-Cass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7\/Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrue Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e182\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length (mm)\u003c\/td\u003e\n\u003ctd\u003e2700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e41mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e23%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction by Area\u003c\/td\u003e\n\u003ctd\u003e5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eObservational Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.78\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Mag.\u003c\/td\u003e\n\u003ctd\u003e13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e354\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering (compared to next size down)\u003c\/td\u003e\n\u003ctd\u003e44%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGeneral Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003ePrimary Mirror\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length (Retract\/Ext.)\u003c\/td\u003e\n\u003ctd\u003e22\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e8.625\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessories\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finder\u003c\/td\u003e\n\u003ctd\u003e9x50 Finder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Accessories\u003c\/td\u003e\n\u003ctd\u003eV-Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepieces\u003c\/td\u003e\n\u003ctd\u003e28 LET\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification w\/ Included Eyepieces\u003c\/td\u003e\n\u003ctd\u003e96.4x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Case\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":40481979007049,"sku":"S11540","price":1675.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/RS1834_S11540_Skymax180_OTAOnly_LeftFront_NoBackground-scr_1800x1800_b8923b0d-7cd8-4574-a93a-f6dbb106438f.webp?v=1723146067"},{"product_id":"sky-watcher-starlux-190-190mm-maksutov-newtonian-f-5-3-optical-tube","title":"Sky-Watcher Starlux 190  Maksutov-Newtonian f\/5.3 Optical Tube","description":"\u003cp\u003eThe Sky-Watcher f\/5.3 190mm Maksutov-Newtonian optical system is a quality fast focal ratio performer that excels at deep space imaging and viewing.\u003c\/p\u003e\n\u003cp\u003eThe exciting 7.5\" f\/5.3 Mak-Newt from Sky-Watcher is just what astrophotographers and serious deep space visual observers have been looking for. It uses a hybrid optical system that combines a Newtonian reflector's parabolic primary mirror with a Maksutov's spherical front corrector. The result is a system that corrects for both coma and spherical and chromatic aberrations.\u003c\/p\u003e\n\u003cp\u003eThe Maksutov-Newtonian design provides large aperture\/fast focal ratio apochromatic performance similar to that of a fine refractor with exceptional field correction in a compact and affordable package. The small secondary obstruction yields a sharper and higher contrast image than a Schmidt-Cassegrain - both visually and photographically. The fast f\/5.3 focal ratio makes the Sky-Watcher Mak-Newt an excellent wide field photographic instrument for deep sky imaging.\u003c\/p\u003e\n\u003cp\u003eThe optical tube is made of rolled steel, powder-coated gloss black, with gold fleck accents. The front and rear cells are painted die-cast aluminum. The front cell is perforated to allow faster cool down of the Maksutov corrector. A precision 2\" Crayford focuser is standard. The smooth backlash-free focuser has both coarse and ultra-fine (10:1 ratio) focusing knobs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this 180mm Sky-Watcher Maksutov-Cassegrain . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Newtonian optics:\u003c\/strong\u003e 7.5\" (190mm) aperture, 1000mm focal length, f\/5.3. The optical system uses Pyrex mirrors (a parabolic primary and a diagonal flat). The parabolic primary mirror helps correct for spherical aberration. The diagonal mirror is attached directly to the Maksutov corrector, instead of being supported by a traditional Newtonian reflector's spider vanes. This eliminates the diffraction spikes typical of spider vanes to improve contrast. The Maksutov spherical corrector lens is made of premium Schott crown optical glass and is fully multi-coated on both sides with multiple layers of anti-reflection materials for high light transmission and good contrast. Internal baffling reduces stray light to further improve the contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFocuser:\u003c\/strong\u003e Dual-speed 2\" Crayford type with 10:1 ratio fine focusing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2\" eyepiece:\u003c\/strong\u003e The 36x eyepiece is a fully multi-coated three-element Sky-Watcher 28mm LET design with a long 20mm eye relief and a twist-up eyecup. The eyepiece field of view is 1.55° across, a little larger than three lunar diameters, for expansive views of nebulas, open and globular star clusters, and galaxies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinder:\u003c\/strong\u003e 9 x 50mm right-angle correct image dark crosshair achromatic refractor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMounting rings and dovetail:\u003c\/strong\u003e Dual split tube rings are attached to a Vixen-style dovetail bar for installing the scope on any altazimuth or equatorial mount that uses a Vixen-style saddle. The split rings let you adjust the rotation and fore and aft position of the scope relative to the mount for balancing the scope and adjusting the focuser to the most comfortable viewing and imaging position. A 1\/4\"-20 thread stud on the top of one of the tube rings lets you piggyback a camera onto the scope for wide-field photography.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e two years.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1000mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/5.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e333x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e29 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.61 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eS11550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e050234115506\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eMak-Newtonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd\u003eRadiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eBK7\/Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Aperture (mm)\u003c\/td\u003e\n\u003ctd\u003e203\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length (mm)\u003c\/td\u003e\n\u003ctd\u003e1000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd\u003e64mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd\u003e34%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Obstruction by Area\u003c\/td\u003e\n\u003ctd\u003e11%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eObservational Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDawes Limit\u003c\/td\u003e\n\u003ctd\u003e0.61\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd\u003e0.74\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Mag.\u003c\/td\u003e\n\u003ctd\u003e13.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd\u003e374\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering (compared to next size down)\u003c\/td\u003e\n\u003ctd\u003e11%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eGeneral Info\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Dual Speed Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length (Retract\/Ext.)\u003c\/td\u003e\n\u003ctd\u003e37.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e9.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd\u003e29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessories\u003c\/th\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Finder\u003c\/td\u003e\n\u003ctd\u003e8x50 RACI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Accessories\u003c\/td\u003e\n\u003ctd\u003eRings\/V-Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Eyepieces\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Case\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":40481979039817,"sku":"S11550","price":2375.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/RS1858_S11550_Starlux190_OTAOnly_LeftFront_NoBackground-scr_1800x1800_fc664ae4-64ed-4376-9ddb-a279aeb77760.webp?v=1723149089"},{"product_id":"sky-watcher-skymax-102-az-gti-102mm-f-13-goto-maksutov-cassegrain-telescope","title":"Sky-Watcher Skymax 102 AZ-Gti 102mm f\/13 GoTo Maksutov-Cassegrain Telescope S21120","description":"\u003cp\u003e\u003cstrong\u003eSky-Watcher Skymax 102 AZ-Gti Highlights:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-selenium=\"highlightList\" class=\"top-section-list\"\u003e\n\u003cli class=\"top-section-list-item\"\u003e102mm Aperture Maksutov-Cassegrain OTA\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003e1300mm Focal Length, f\/13 Focal Ratio\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003eLimited-Diffraction Optical System\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003eComputer GoTo AZ Mount\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003eBuilt-In WiFi Module for Remote Control From Your Smart Device\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003eTwo 1.25\" Eyepieces, 90° Diagonal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLike all Maksutov-Cassegrain telescopes, such as the ultra-premium Questars, the 102mm Sky-Watcher is designed for observing anything that is small and distant and needs a lot of power to resolve clearly. Its Maksutov-Cassegrain folded optical system provides sharp, high contrast images - mountains and craters on the Moon; major surface details on Mars; multiple storm bands on Jupiter; even Cassini's Division in the rings of Saturn occasionally pops into view in good seeing conditions.\u003c\/p\u003e\n\u003cp\u003eOutside the solar system, the high resolution 102mm Sky-Watcher splits close binary stars, resolves open star clusters, begins to reveal the brighter nebulas and galaxies, and more. It can also be used as a very high performance terrestrial spotting scope.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this 102mm Sky-Watcher Maksutov-Cassegrain . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optics:\u003c\/strong\u003e 4\" (102mm) aperture, 1300mm focal length, f\/12.75 optical system. The system's Maksutov corrector lens is fully multi-coated on both sides with multiple layers of anti-reflection materials for high light transmission and good contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 1.25\" 90°\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTwo 1.25\" eyepieces:\u003c\/strong\u003e The first is a 25mm Plössl providing 52x. The eyepiece field of view is nearly 1° across, twice the diameter of the full Moon, for expansive views of the Moon, star clusters, and terrestrial observing. The second is a 10mm Plössl providing 130x for close-up views of the Moon and planets, globular star clusters, binary stars and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinder:\u003c\/strong\u003e illuminated red dot finder. The red dot finder is a quick and easy way to point your telescope exactly to the desired object in the sky. There's no need to worry about the inverted images you see through traditional finders. Just align the red dot seen in the finder with the desired object and you're done.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDovetail:\u003c\/strong\u003e Vixen-style dovetail for installing the scope on any altazimuth or equatorial mount that uses a Vixen-style saddle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis is a loaded lightweight mount.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe free SynScan Pro app for Android and iOS devices turns this mount into a serious observation machine with 42,900 objects in its database.  The AZ-GTi also has periodic error correction, backlash compensation, tours, and a DSLR camera control.  I can not state enough just how fuil featured this mount is.  The built-in wifi connection allows you to connect without needing an additonal router or internet connection.  With a payload capacity of 11 pounds most small to medium sized instruments should be right at home. Built in clutch knobs on both axis allow for easy movement by hand. With certain mounts when you move the scope by hand you will lose your computer alignment.  Not with this one.  The dual encoders will keep exact axis aligment when you unlock the mount and move the scope manually. Once you are locked in and tracking the DC servo motors run quietly and have minimum vibration. The mount runs on eight user-supplied AA batteries.\u003c\/p\u003e\n\u003cp\u003eSo, you want to know what exactly the SynScan App does? One this it doesn't do is cost money.  It is free at the app store.  The app will control the mount wirelessly allowing you to align, move, control from your device.  The GPS unit will automatically update your location, day, date, time making it even easier to line up your mount.  Once you get it all aligned the SynScan has a fantastic tour abilty taking you around the night sky to the best objects that are available.  It has three tracking rates (solar, lunar, and sidereal) as well as 10 slewing speeds.\u003c\/p\u003e\n\u003cp\u003eAnd in closing, we can talk about the 5.3 pound tripod and pier extension.  The tripod is an adjustable height tripod with aluminum legs.  Its maximum height is 43.3\" and the extension pier will give you a few more inches making night time viewing a tad more comfortable while keeping vibration at a minimum.  The tripod legs will spread to 42.3 inches and are held in place with a spreader tray that is designed to hold personal effects or accessories while you are out observing.  The feet of the AZ-GTi are spiked to increase stability when you are on different types of terrain or soft ground.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e102mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/12.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMotorized Controls\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eComputer GoTo Via Your Smart Device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplied Eyepiece\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e25mm and 10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eView Finder\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eRed Dot Non-Magnifying\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eEyepieces: 1.25\" 25mm (52x) and 10mm (130x) 1.25\" Star Diagonal Red Dot Non-Magnified Finder AZ Mount Head Pier Extension Tripod Spreader Tray\u003c\/span\u003e\u003c\/p\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":40481985560649,"sku":"S21120","price":765.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AZ-GTi102_Main_1800x1800_317f9503-9917-4f52-a53d-4b02b5299558.webp?v=1723143714"},{"product_id":"sky-watcher-skymax-127-az-gti-127mm-f-12-goto-maksutov-cassegrain-telescope","title":"Sky-Watcher Skymax 127 AZ-Gti 127mm f\/12 Goto Maksutov-Cassegrain Telescope","description":"\u003cul class=\"top-section-list\" data-selenium=\"highlightList\"\u003e\n\u003cli class=\"top-section-list-item\"\u003e127mm Aperture Maksutov-Cassegrain OTA\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003e1500mm Focal Length, f\/12 Focal Ratio\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003eMotorized Computer-Controlled AZ Mount With Built In WiFi\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003eTwo 1.25\" Eyepieces, 90° Diagonal\u003c\/li\u003e\n\u003cli class=\"top-section-list-item\"\u003eAluminum Tripod with Extension Pier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis 127mm (5\") aperture Sky-Watcher Maksutov-Cassegrain provides exceptional high contrast\/high resolution solar system images at a very sensible price. You can see the phases of Mercury and Venus; lunar rilles and craters less than three miles across; Martian polar caps and major dark surface features; cloud belts on Jupiter, with some detail in the belts, plus the shadows of Jupiter's moons on the planet during transits; Cassini's division in Saturn's rings on a regular basis, plus four or five of its moons; and Uranus and Neptune visible as very small discs.\u003c\/p\u003e\n\u003cp\u003eOutside the solar system, the high resolution 127mm Sky-Watcher will show you dozens of globular clusters, emission nebulas, planetary nebulas, and galaxies; all of the Messier objects and many of the brighter NGC objects from a dark sky site (with some internal detail visible in many nebulas, although most galaxies will remain relatively featureless hazy patches). It can also be used as a very high performance terrestrial spotting scope.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this 127mm Sky-Watcher Maksutov-Cassegrain . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain optics:\u003c\/strong\u003e 5\" (127mm) aperture, 1500mm focal length, f\/11.8 optical system. The system's Maksutov corrector lens is fully multi-coated on both sides with multiple layers of anti-reflection materials for high light transmission and good contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal focuser:\u003c\/strong\u003e Focuses by moving the primary mirror fore and aft in the optical tube by means of a large focusing knob on the rear cell.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStar diagonal:\u003c\/strong\u003e 1.25\" 90° mirror type.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1.25\" eyepiece:\u003c\/strong\u003e The Skymax 127 AZ-Gti comes with two 1.25\" eyepieces.  A 25mm and 10mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinder:\u003c\/strong\u003e Red dot finder\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDovetail:\u003c\/strong\u003e Vixen-style dovetail for installing the scope on any altazimuth or equatorial mount that uses a Vixen-style saddle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e two years.\u003c\/p\u003e\n\u003cp\u003eThis is a loaded lightweight mount.\u003c\/p\u003e\n\u003cp\u003eThe free SynScan Pro app for Android and iOS devices turns this mount into a serious observation machine with 42,900 objects in its database.  The AZ-GTi also has periodic error correction, backlash compensation, tours, and a DSLR camera control.  I can not state enough just how fuil featured this mount is.  The built-in wifi connection allows you to connect without needing an additonal router or internet connection.  With a payload capacity of 11 pounds most small to medium sized instruments should be right at home. Built in clutch knobs on both axis allow for easy movement by hand. With certain mounts when you move the scope by hand you will lose your computer alignment.  Not with this one.  The dual encoders will keep exact axis aligment when you unlock the mount and move the scope manually. Once you are locked in and tracking the DC servo motors run quietly and have minimum vibration. The mount runs on eight user-supplied AA batteries.\u003c\/p\u003e\n\u003cp\u003eSo, you want to know what exactly the SynScan App does? One this it doesn't do is cost money.  It is free at the app store.  The app will control the mount wirelessly allowing you to align, move, control from your device.  The GPS unit will automatically update your location, day, date, time making it even easier to line up your mount.  Once you get it all aligned the SynScan has a fantastic tour abilty taking you around the night sky to the best objects that are available.  It has three tracking rates (solar, lunar, and sidereal) as well as 10 slewing speeds.\u003c\/p\u003e\n\u003cp\u003eAnd in closing, we can talk about the 5.3 pound tripod and pier extension.  The tripod is an adjustable height tripod with aluminum legs.  Its maximum height is 43.3\" and the extension pier will give you a few more inches making night time viewing a tad more comfortable while keeping vibration at a minimum.  The tripod legs will spread to 42.3 inches and are held in place with a spreader tray that is designed to hold personal effects or accessories while you are out observing.  The feet of the AZ-GTi are spiked to increase stability when you are on different types of terrain or soft ground.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100.088%; height: 176.344px;\" id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eAperture\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003e127mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eFocal Length\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003e1500mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003ef\/12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003e9.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eMotorized Controls\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003eWiFi Computer GoTo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003e17 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eSupplied Eyepiece\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003e10mm (150x) 25mm (60x)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eTelescope Type\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 51.7005%; height: 19.5938px;\"\u003eView Finder\u003c\/th\u003e\n\u003ctd style=\"width: 45.3843%; height: 19.5938px;\" class=\"data\"\u003eRed Dot Non-Magnifying\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eEyepieces: 10mm (150x) 25mm (60x) Diagonal: 1.25\" Star diagonal Finder: Non Magnified Red Dot Tripod Pier Extension Mount Head\u003c\/span\u003e\u003c\/p\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":40481985593417,"sku":"S21130","price":995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/1525720520000_img_983288.jpg?v=1675379687"},{"product_id":"celestron-cgx-700-7-maksutov-cassegrain-telescope","title":"Celestron CGX 700 7\" Maksutov-Cassegrain Telescope","description":"\u003cp\u003e700 Maksutov-Cassegrain telescope with f\/15 focal ratio provides high contrast views of the planets and lunar landscapes, perfect for serious planetary imagers and visual observers.\u003c\/p\u003e\n\u003cp\u003eCelestron’s premium StarBright XLT coatings ensure maximum light transmission.\u003c\/p\u003e\n\u003cp\u003eThe CGX, with its 55 lb. load capacity, is Celestron’s most innovative, state-of-the art, computerized equatorial mount to date, and provides a very sturdy and rigid platform.\u003cbr\u003eThe drive system utilizes low cog DC Servo motors with integrated optical encoders, belt and pulley motor connection, spring-loaded steel worm gears supported by precision sealed bearings, and brass worm wheels for smooth, accurate slewing and tracking performance with little backlash.\u003c\/p\u003e\n\u003cp\u003eThe 700 Maksutov-Cassegrain CGX telescope (CGX 700 Mak) is a specialized instrument designed for detailed, high contrast views of smaller celestial objects like the planets. With the Maksutov-Cassegrain optical tube and sturdy equatorial mount and tripod, this kit will provide unparalleled views of the planets and up-close views of the lunar surface, including craters and maria, Maks are also well suited to hunting smaller, fainter, deep sky objects such as globular clusters and planetary nebulae. Astronomers located in urban astronomers will appreciate the Mak’s ability to bring out more contrast in celestial objects. Transporting the entire system to a dark site is not a problem either. The optical tube, mount head, tripod, counterweight bar, and counterweight all disassemble, with no tools required, into separate manageable pieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain Optical Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Mak is a catadioptric telescope, which means the optical design includes both a lens and a mirror. The light coming through a Mak passes through the corrector lens to the primary mirror and back to a spherical secondary mirror before it hits your eyepiece. Images are bright, sharp, and virtually free of chromatic aberration.\u003c\/p\u003e\n\u003cp\u003eThe Maksutov-Cassegrain’s optical design offers several unique benefits. Instead of a secondary mirror, the Mak features a “secondary spot” of reflective coating applied directly to the inside of the corrector plate. Because of this, the telescope does not require frequent collimation like a Schmidt-Cassegrain. Also, the secondary spot is significantly smaller than a traditional Schmidt-Cassegrain secondary mirror, giving the Mak its signature high-contrast views.\u003c\/p\u003e\n\u003cp\u003eOne important thing to note about Maksutov-Cassegrain telescopes is that the larger, heavier Maksutov corrector plate takes longer to cool down and adjust to ambient air temperature compared to a Schmidt-Cassegrain of the same aperture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCGX Mount \u0026amp; Tripod\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe new Celestron CGX go-to equatorial mount looks like a cross between Celestron's CGEM II and the CGE Pro mount, combining the best features from both. The ergonomically-designed CGX has a fresh, attractive, bold appearance and easier set-up than earlier EQ mounts. Mechanical and electronic changes increase the peyload capacity to a solid 55 pounds. The new design provides a lower profile EQ head with a better balance point. Celestron has also added a integrated handles to assist with setup and transportation.\u003c\/p\u003e\n\u003cp\u003eThe CGX mount head contains dual-axis slewing\/tracking motors on each axis for go-to computer control. This is where the real upgrades start.The mount uses spring-loaded worm gears with belt drives. The belt drives offer smooth, quiet operation, with precision slewing and tracking. The motor armatures are skewed to minimize cogging for precise jitter-free low speed tracking. The motor drives and their wiring are all internal, keeping them snag-free and free from dust and debris.\u003c\/p\u003e\n\u003cp\u003eRedesigned electronics deliver constant regulated power to the motors, making them capable of driving the telescope even when the mount is not perfectly balanced. This allows the CGX to have the payload capacity of much larger mounts without sacrificing smooth tracking motion and pointing accuracy across the entire sky. For cutting edge mount control, the CGX supports Celestron's optional SkyPortal WiFi that lets you control the CGX from your smart devices. For automatic sky alignment, you can add Celestron's optional StarSense AutoAlign.\u003c\/p\u003e\n\u003cp\u003eThe mount requires a minimum 3.5 amp 12 VDC power supply to operate. The maximum 3.5 amp power draw happens only briefly when accelerating to the high speed slewing mode from a standing start, or decelerating from the high speed mode when approaching a computer-chosen object. Normal power draw with a well-balanced payload is generally less than half the maximum draw.\u003c\/p\u003e\n\u003cp\u003eThe mount comes with a car battery cord to operate from the cigarette lighter plug of your car or from a rechargeable 12V battery pack. The 17 amp hour capacity Celestron Power Tank #4517V is recommended and will operate the mount all night long without danger of running out of power. An optional Celestron #2338PRO 5 amp AC adapter will let you power the CGX all night long from household AC.\u003c\/p\u003e\n\u003cp\u003eTo make a casual polar alignment for visual use quick and easy, there's a latitude scale with large ergonomically-friendly altitude and azimuth adjustment knobs. No polar alignment finderscope is available to aid in the precise polar alignment required for long exposure astrophotography, nor is any needed.\u003c\/p\u003e\n\u003cp\u003eA unique Celestron All-Star Polar Alignment program built into the NexStar hand control helps you do a very precise computerized polar alignment in mere minutes, using any bright star, even when Polaris is hidden by trees or buildings. It works in both northern and southern hemispheres. This technology basically gets rid of the need for a polar alignment scope.\u003c\/p\u003e\n\u003cp\u003eThe supplied 17 pound counterweight is locked in place with a single hand-tighten knob, making it easy to rebalance a scope if you add heavy photographic accessories. If needed, optional counterweights are available to balance very heavy loads.\u003c\/p\u003e\n\u003cp\u003eFor observing or imaging objects near the meridian (the imaginary line passing directly overhead from North to South), the CGX is designed to track 20° past the meridian for uninterrupted imaging through the most ideal part of the sky.\u003c\/p\u003e\n\u003cp\u003eThere are nine motor drive speeds: 0.5x and 1x sidereal for guiding; 4x, 8x, 16x, and 64x for centering; and 1°, 2°, and a fast 5° per second for slewing. Preset tracking rates include sidereal, solar, and lunar. Equatorial tracking modes are available for both northern and southern hemispheres.\u003c\/p\u003e\n\u003cp\u003eNew for the CGX mount is a telescope control software that has been developed in conjunction with Planewave Instruments. Planewave Instruments produces some of the most sophisticated imaging systems on the planet. The features of the included software are extremely robust. They include multi-point go-to modeling, focusing, and plate solving. ou will no longer need a third party advanced PC control software as this has it all.\u003c\/p\u003e\n\u003cp\u003eThe supplied NexStar computer hand control has a built-in database of more than 40,000 stars and objects. These include the complete RNGC, Messier, Caldwell, IC, and Abell catalogs; selected SAO stars; the planets, the Moon, and others. The custom database lists of all the most famous deep-sky objects by name and catalog number; the most beautiful double, triple and quadruple stars; selected variable stars; non-planetary solar system objects; and asterisms.\u003c\/p\u003e\n\u003cp\u003eYou can also store and edit the right ascension and declination of 100 additional user-defined objects of your own choosing, such as the comet and asteroid coordinates published monthly in Astronomy and Sky \u0026amp; Telescope magazines. The computer control can find any of those objects with only a few keystrokes, and track them with high accuracy for visual or photographic applications. There is enhanced information on over 200 of the most note-worthy objects.\u003c\/p\u003e\n\u003cp\u003eThe NexStar hand control provides a constant digital r. a. and dec readout of the scope's position on the sky. This provides much greater accuracy than conventional manual setting circles for star-hopping or locating objects by their celestial coordinates alone, should you want to observe the old-fashioned way without using the computer to find objects for you.\u003c\/p\u003e\n\u003cp\u003eThe software built into the NexStar hand control includes mount calibration, database filter limits, hibernate, five alignment procedures, user-defined slew limits, a new \"All-Star\" polar alignment routine that uses any bright star for a quick and accurate polar alignment, and more. Built-in adjustable backlash compensation permits precise corrections during astrophotography and when observing visually at high powers. A high precision pointing subroutine in the computer lets you point accurately at objects that you want to photograph that are too dim to be seen though the scope.\u003c\/p\u003e\n\u003cp\u003eThe software includes permanent programmable periodic error correction (PEC) to correct for the minor periodic tracking errors inherent to all worm drives that might otherwise mar your long exposure photographs. The CGX mount retains the PEC recordings when it is powered down. The hand control and motor control software is flash-upgradeable to allow you to download the latest product updates over the Internet to keep your CGX mount always at the cutting edge of technology.\u003c\/p\u003e\n\u003cp\u003eAn autoguider port is located on the electronic pier for long exposure astrophotography. The autoguider port can use a six-pin RJ-12 modular jack ST-4 compatible CCD autoguider to automatically control the drive motors during long exposure astrophotography.\u003c\/p\u003e\n\u003cp\u003eFive different alignment methods are built into the Celestron mount's NexStar computer: 2-star align, quick align, 1-star align, last alignment, and solar system align. This allows you to choose a level of computer accuracy in automatically finding objects with which you are comfortable. Alignment is easily accomplished in only a few short minutes. You can be observing in less than 15 minutes after you first take your CGX-mounted scope outdoors.\u003c\/p\u003e\n\u003cp\u003eIn addition, the NexStar computer hand control is GPS-compatible (using an optional inexpensive SkySync GPS module) for full GPS (Global Positioning System) accuracy. Adding GPS to the computer is something no competitively-priced mount can do. Once the scope is approximately polar aligned, the 16-channel SkySync GPS system uses signals from government satellites to calculate the scope's location on earth with an accuracy measured in meters. The system also calculates the current time based on the split second accuracy of the GPS time signals.\u003c\/p\u003e\n\u003cp\u003eAfter the SkySync quickly completes these calculations, and enters the information into the computer control for you automatically, the computer then orients the scope with the sky, slews to a pair of guide stars, asks you to confirm that the stars are in the center of the field (and center them if they're not precisely aligned), and then starts finding and tracking over 40,000 objects for you at your command. With the Celestron CGX go-to mount and the SkySync, orienting your scope in time and space on earth and aligning it on the sky becomes almost as easy a task as simply turning the mount on.\u003c\/p\u003e\n\u003cp\u003eThe new, 2\" diameter adjustable height tripod has graduated markings on the legs to help with quick leveling.The center leg brace is drilled to form a convenient accessory tray that holds 1.25\" and 2\" eyepieces to keep them up out of the dew-soaked grass.\u003c\/p\u003e\n\u003cp\u003eOptical tubes are installed on the CGX mount using a Dual-Slot on the mount head that accepts either a Celestron CGE-style or Losmandy D-plate dovetail slide bar or the narrower Vixen-Style dovetail. This allows the optical tube to be quickly and precisely balanced fore and aft on the mount, eliminating the need for an extra counterweight to balance a camera or other accessories. Setup and takedown times are exceptionally fast, as a single large hand-tighten knob holds the optical tube in place. A second lock knob prevents the tube from sliding off the mount should the hand-tighten knob loosen.\u003c\/p\u003e\n\u003cp\u003eThe complete CGX mount weighs 81 pounds (36.7 kg). The tripod weighs 20 pounds (9.1 kg). The equatorial head weighs 44 pounds (19.9 kg). The single supplied counterweight weighs 17 pounds (7.7 kg).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccessories Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CGX 700 Mak comes complete with a 2” Visual Back, a 2” Star Diagonal with 1.25” adapter, a 28 mm wide-field 2” eyepiece, and a large 8x50 straight-through finderscope. The optical tube accommodates the larger 2” accessories, such as 2” Barlow lenses, the 2” eyepiece and filter kit, and larger wide-field eyepieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStarBright XLT Technology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStarBright XLT is Celestron’s revolutionary optical coating system that outperforms any other coating in the commercial telescope market. There are three major components that make up our StarBright XLT high-transmission optical system design:\u003c\/p\u003e\n\u003cp\u003eUnique enhanced multi-layer mirror coatings made from precise layers of aluminum, SiO2 (quartz), TiO2 (titanium dioxide), and SiO2 (silicon dioxide). Reflectivity is fairly flat across the spectrum, optimizing it for both imaging and visual observing.\u003cbr\u003eMulti-layer anti-reflective coatings made from precise layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide). Hafnium—a rare element that costs nearly $2,000 per kilogram—gives us a wider band pass than the titanium used in competing coatings.\u003cbr\u003eHigh-transmission water white glass is used instead of soda lime glass for the corrector lens. Water white glass transmits about 90.5% without anti-reflective coatings; that’s 3.5% better transmission than uncoated soda lime glass. When water white glass is used in conjunction with StarBright XLT’s anti-reflective coatings, the average transmission reaches 97.4%, an 8% improvement.\u003c\/p\u003e\n\u003cp\u003eTaken together, these three components make StarBright XLT one of the finest optical coatings available. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCelestron’s Starry Night Special Edition Software\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStarry Night is a planetarium software package which provides easy-to-understand explanations and impressive visuals of all kinds of night sky phenomena. Use Starry Night to learn more about extra solar planets imagery, 3D Stars rendering, observation planning, telescope control, multiple-panel printing, and much more. Starry Night is available on macOS and Microsoft Windows. \u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2700mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e44 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e420x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMotorized Controls\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eComputerized GoTo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e104.2 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Coatings\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eStarbright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e.52 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplied Eyepiece\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e28mm 2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eView Finder\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eAccessories included: 2” Visual Back, 2” Star Diagonal with 1.25” adapter, 28 mm eyepiece (2”), 8x50 finderscope\u003c\/span\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40481985986633,"sku":"CGX700","price":3999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/12049_cgx_700_maksutov-cassegrain_telescope_01_570x380_2x_04b0ecc9-267f-43a6-b4d6-330b2ffbda6c.jpg?v=1675379712"},{"product_id":"celestron-cgem-ii-700-7-maksutov-cassegrain-telescope","title":"Celestron CGEM II 700 7\" Maksutov-Cassegrain Telescope","description":"\u003cp\u003e700 Maksutov-Cassegrain telescope with f\/15 focal ratio provides high contrast views of the planets and lunar landscapes, perfect for serious planetary imagers and visual observers.\u003c\/p\u003e\n\u003cp\u003eCelestron’s premium StarBright XLT coatings ensure maximum light transmission.\u003c\/p\u003e\n\u003cp\u003eThe CGEM II, with its 40 lbs load capacity, is the latest update to the venerable CGEM mount and provides a sturdy and rigid platform.\u003c\/p\u003e\n\u003cp\u003eThe drive system, consisting of low cog DC Servo motors with integrated optical encoders, steel worm gears supported by precision sealed bearings, and brass worm wheels, ensures smooth and accurate slewing and tracking.\u003c\/p\u003e\n\u003cp\u003eThe 700 Maksutov-Cassegrain CGEM II telescope (CGEM II 700 Mak) is a specialized instrument designed for detailed, high contrast views of smaller celestial objects like the planets. With the Maksutov-Cassegrain optical tube and sturdy equatorial mount and tripod, this kit will provide unparalleled views of the planets and up-close views of the lunar surface, including craters and maria, Maks are also well suited to hunting smaller, fainter, deep sky objects such as globular clusters and planetary nebulae. Astronomers located in urban astronomers will appreciate the Mak’s ability to bring out more contrast in celestial objects. Transporting the entire system to a dark site is not a problem either. The optical tube, mount head, tripod, counterweight bar, and counterweight all disassemble, with no tools required, into separate manageable pieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain Optical Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Mak is a catadioptric telescope, which means the optical design includes both a lens and a mirror. The light coming through a Mak passes through the corrector lens to the primary mirror and back to a spherical secondary mirror before it hits your eyepiece. Images are bright, sharp, and virtually free of chromatic aberration.\u003c\/p\u003e\n\u003cp\u003eThe Maksutov-Cassegrain’s optical design offers several unique benefits. Instead of a secondary mirror, the Mak features a “secondary spot” of reflective coating applied directly to the inside of the corrector plate. Because of this, the telescope does not require frequent collimation like a Schmidt-Cassegrain. Also, the secondary spot is significantly smaller than a traditional Schmidt-Cassegrain secondary mirror, giving the Mak its signature high-contrast views.\u003c\/p\u003e\n\u003cp\u003eOne important thing to note about Maksutov-Cassegrain telescopes is that the larger, heavier Maksutov corrector plate takes longer to cool down and adjust to ambient air temperature compared to a Schmidt-Cassegrain of the same aperture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCGEM II Mount \u0026amp; Tripod\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Celestron CGEM II is an upgraded heavy-duty computerized go-to German equatorial moun. The ergonomically-designed CGEM II has a fresh, attractive, bold appearance – and a 40 pound payload capacity. This allows it to carry Celestron SCT optical tubes up to 11\" in aperture, plus a full load of imaging accessories, as well as virtually any other optical tube and accessory payload less than 40 pounds in weight.\u003c\/p\u003e\n\u003cp\u003eThe CGEM II mount head contains dual-axis slewing\/tracking motors on each axis for go-to computer control. Steel worm gears and 90mm diameter brass worm wheels assure long-term reliability and high accuracy performance. The use of low cog DC Servo motors with integrated optical positioning encoders offers smooth, quiet operation and precision slewing and tracking. The motor armatures are skewed to minimize cogging for precise jitter-free low speed tracking. The motor drives and their wiring are all internal, keeping them snag-free and free from dust and debris.\u003c\/p\u003e\n\u003cp\u003eThe mount requires a minimum 1.5 amp 12 VDC power supply to operate. The maximum 1.5 amp power draw happens only briefly when accelerating to, or decelerating from, the high speed slewing mode from a standing start with a small payload (8\" SCT OTA or similar). Normal power draw with a well-balanced payload is generally less than half the maximum draw.\u003c\/p\u003e\n\u003cp\u003eThe mount comes with a car battery cord to operate from the cigarette lighter plug of your car or from a rechargeable 12V battery pack. The 17 amp hour capacity Celestron Power Tank #4517V is recommended and will operate the mount all night long without danger of running out of power. An optional Celestron #2338PRO 5 amp ac adapter is available to run the CGEM II all night from household AC in backyard or observatory.\u003c\/p\u003e\n\u003cp\u003eTo make a casual polar alignment for visual use quick and easy, there's a latitude scale with large ergonomically-friendly altitude and azimuth adjustment knobs. No polar alignment finderscope is available to aid in the precise polar alignment required for long exposure astrophotography, nor is any needed. A unique Celestron All-Star Polar Alignment program built into the NexStar hand control helps you do a very precise computerized polar alignment in mere minutes, using any bright star, even when Polaris is hidden by trees or buildings. It works in both northern and southern hemispheres.\u003c\/p\u003e\n\u003cp\u003eThe supplied 17 pound counterweight is locked in place on the steel counterweight shaft with a single hand-tighten knob, making it easy to rebalance a scope if you add heavy photographic accessories. If needed, optional counterweights are available to balance very heavy loads.\u003c\/p\u003e\n\u003cp\u003eFor observing or imaging objects near the meridian (the imaginary line passing directly overhead from North to South), the CGEM II is designed to track well past the meridian for uninterrupted imaging through the most ideal part of the sky.\u003c\/p\u003e\n\u003cp\u003eThere are nine motor drive speeds: 0.5x and 1x sidereal for guiding; 4x, 8x, 16x, and 64x for centering; and 1°, 2°, and a fast 5° per second for slewing. Preset tracking rates include sidereal, solar, and lunar. Equatorial tracking modes are available for both northern and southern hemispheres.\u003c\/p\u003e\n\u003cp\u003eThe supplied NexStar computer hand control has a built-in database of more than 40,000 stars and objects. These include the complete RNGC, Messier, Caldwell, IC, and Abell catalogs; selected SAO stars; the planets, the Moon, and others. The custom database lists of all the most famous deep-sky objects by name and catalog number; the most beautiful double, triple and quadruple stars; selected variable stars; non-planetary solar system objects; and asterisms.\u003c\/p\u003e\n\u003cp\u003eYou can also store and edit the right ascension and declination of 400 additional user-defined objects of your own choosing, such as the comet and asteroid coordinates published monthly in Astronomy and Sky \u0026amp; Telescope magazines. The computer control can find any of those objects with only a few keystrokes, and track them with high accuracy for visual or photographic applications. There is enhanced information on over 200 of the most note-worthy objects.\u003c\/p\u003e\n\u003cp\u003eThe NexStar computer control of the smooth and precise CGEM II go-to mount makes finding over 40,000 stars and objects easy and automatic, so you can spend more time looking at them, rather than looking for them.\u003c\/p\u003e\n\u003cp\u003eNew for the CGEM II mount, a USB 2.0 communication port on the hand control allows you to operate the telescope via a personal computer using a USB cable and NexRemote software CD-ROM. The hand control and motor control software is flash-upgradeable to allow you to download the latest product updates over the Internet to keep your CGEM II mount always at the cutting edge of technology. An autoguider port is located on the electronic pier for guided, but unattended, long exposure astrophotography.\u003c\/p\u003e\n\u003cp\u003eThe NexStar hand control provides a constant digital r. a. and dec readout of the scope's position on the sky. This provides much greater accuracy than conventional manual setting circles for star-hopping or locating objects by their celestial coordinates alone, should you want to observe the old-fashioned way without using the computer to find objects for you.\u003c\/p\u003e\n\u003cp\u003eThe software built into the NexStar hand control includes mount calibration, database filter limits, hibernate, five alignment procedures, user-defined slew limits, a new \"All-Star\" polar alignment routine that uses any bright star for a quick and accurate polar alignment, and more. Built-in adjustable backlash compensation permits precise corrections during astrophotography and when observing visually at high powers. A high precision pointing subroutine in the computer lets you point accurately at objects that you want to photograph that are too dim to be seen though the scope.\u003c\/p\u003e\n\u003cp\u003eThe software includes permanent programmable periodic error correction (PEC) to correct for the minor periodic tracking errors inherent to all worm drives that might otherwise mar your long exposure photographs. The CGEM II mount retains the PEC recordings when it is powered down. The hand control and motor control software is flash-upgradeable to allow you to download the latest product updates over the Internet to keep your CGEM II mount always at the cutting edge of technology.\u003c\/p\u003e\n\u003cp\u003eAn autoguider port is located on the electronic pier for long exposure astrophotography. The autoguider port can use a six-pin RJ-12 modular jack ST-4 compatible CCD autoguider to automatically control the drive motors during long exposure astrophotography.\u003c\/p\u003e\n\u003cp\u003eFive different alignment methods are built into the NexStar computer - 2-star align, quick align, 1-star align, last alignment, and solar system align - allowing you to choose a level of computer accuracy in automatically finding objects with which you are comfortable. Alignment is easily accomplished in only a few short minutes. You can be observing in less than 15 minutes after you first take your CGEM II-mounted scope outdoors.\u003c\/p\u003e\n\u003cp\u003eIn addition, the NexStar computer hand control is GPS-compatible (using an optional inexpensive SkySync GPS module) for full GPS (Global Positioning System) satellite accuracy. Adding GPS to the computer is something no competitively-priced mount can do. Once the scope is approximately polar aligned, the 16-channel SkySync GPS system uses signals from government satellites to calculate the scope's location on earth with an accuracy measured in meters. The system also calculates the current time based on the split second accuracy of the GPS time signals.\u003c\/p\u003e\n\u003cp\u003eAfter the SkySync quickly completes these calculations and enters the information into the computer control for you automatically, the computer can then orient the scope with the sky, slew to a pair of guide stars, ask you to confirm that the stars are in the center of the field (and center them if they're not precisely aligned), and then start finding and tracking over 40,000 objects for you at your command. With the CGEM II go-to mount and the SkySync, orienting your scope in time and space on earth and aligning it on the sky becomes almost as easy a task as simply turning the mount on.\u003c\/p\u003e\n\u003cp\u003eThe adjustable height tripod has 2\" diameter stainless steel legs with a metal center leg brace for rigidity to provide excellent damping characteristics. The center leg brace is drilled to form a convenient accessory tray that holds 1.25\" and 2\" eyepiece to keep them up out of the dew-soaked grass.\u003c\/p\u003e\n\u003cp\u003eNew for the CGEM II mount is a dual saddle plate. The saddle plate will now accept both the CGE\/Losmandy wide dovetail plate as well as the AVX\/Vixen style dovetail plate. The dovetail slot on the top of the mount holds the long dovetail slide bar mounted under the optical tube. This allows you to slide the optical tube fore and aft in the dovetail slot to quickly and precisely balance the optical tube in declination when you add or subtract accessories, eliminating the need for an extra counterweight to balance a camera or other accessories. Setup and takedown times are exceptionally fast, as a single large hand-tighten knob holds the optical tube in place. A second lock knob prevents the tube from sliding off the mount should the hand-tighten knob loosen. The oversized dovetail mounting platform assures secure vibration-free tube attachment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccessories Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CGEM II 700 Mak comes complete with a 2” Visual Back, a 2” Star Diagonal with 1.25” adapter, a 28 mm wide-field 2” eyepiece, and a large 8x50 straight-through finderscope. The optical tube accommodates the larger 2” accessories, such as 2” Barlow lenses, the 2” eyepiece and filter kit, and larger wide-field eyepieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStarBright XLT Technology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStarBright XLT is Celestron’s revolutionary optical coating system that outperforms any other coating in the commercial telescope market. There are three major components that make up our StarBright XLT high-transmission optical system design:\u003c\/p\u003e\n\u003cp\u003eUnique enhanced multi-layer mirror coatings made from precise layers of aluminum, SiO2 (quartz), TiO2 (titanium dioxide), and SiO2 (silicon dioxide). Reflectivity is fairly flat across the spectrum, optimizing it for both imaging and visual observing.\u003cbr\u003eMulti-layer anti-reflective coatings made from precise layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide). Hafnium—a rare element that costs nearly $2,000 per kilogram—gives us a wider band pass than the titanium used in competing coatings.\u003cbr\u003eHigh-transmission water white glass is used instead of soda lime glass for the corrector lens. Water white glass transmits about 90.5% without anti-reflective coatings; that’s 3.5% better transmission than uncoated soda lime glass. When water white glass is used in conjunction with StarBright XLT’s anti-reflective coatings, the average transmission reaches 97.4%, an 8% improvement.\u003c\/p\u003e\n\u003cp\u003eTaken together, these three components make StarBright XLT one of the finest optical coatings available. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCelestron’s Starry Night Special Edition Software\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStarry Night is a planetarium software package which provides easy-to-understand explanations and impressive visuals of all kinds of night sky phenomena. Use Starry Night to learn more about extra solar planets imagery, 3D Stars rendering, observation planning, telescope control, multiple-panel printing, and much more. Starry Night is available on macOS and Microsoft Windows. \u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2700mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e40 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e420x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMotorized Controls\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eComputerized GoTo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e96 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Coatings\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eStarbright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e.52 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplied Eyepiece\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e28mm 2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eView Finder\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eAccessories included: 2” Visual Back, 2” Star Diagonal with 1.25” adapter, 28mm eyepiece (2”), 8x50 finderscope\u003c\/span\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40481986019401,"sku":"CGEMII700","price":3299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/12016_cgem-ii_700_maksutov_cassegrain_telescope_03_570x380_2x_ecc1bc10-0cda-4538-b28c-8cb851d1af3c.jpg?v=1675379715"},{"product_id":"celestron-advanced-vx-700-7-maksutov-cassegrain-goto-telescope","title":"Celestron Advanced VX 700 7\" Maksutov Cassegrain GoTo Telescope","description":"\u003cp\u003eThe Celestron AVX 700 7\" Maksutov is an instrument designed to excel at planetary and lunar observation.  The high contrast views will leave you breathless during your evenings under the stars for years to come.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e700 Maksutov-Cassegrain telescope with f\/15 focal ratio provides high contrast views of the planets and lunar landscapes, perfect for serious planetary imagers and visual observers.\u003c\/li\u003e\n\u003cli\u003eCelestron’s premium StarBright XLT coatings ensure maximum light transmission.\u003c\/li\u003e\n\u003cli\u003eAdvanced VX, the most compact and portable of Celestron’s German equatorial mounts, offers a maximum instrument capacity of 30 lb with the same rigidity as our larger mounts and minimal flexure.\u003c\/li\u003e\n\u003cli\u003eEvery feature an astroimager wants: PEC, an autoguider port, the ability to image across the meridian, and more.\u003c\/li\u003e\n\u003cli\u003eNEW dual saddle plate accommodates both the narrow CG-5 and larger CGE dovetail.\u003c\/li\u003e\n\u003cli\u003eAccessories included: 2” Visual Back, 2” Star Diagonal with 1.25” adapter, 28mm eyepiece (2”), 8x50 finderscope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 700 Maksutov-Cassegrain Advanced VX telescope (Advanced VX 700 Mak) is a specialized instrument designed for detailed, high contrast views that sets a new standard in mid-level telescopes. With its Maksutov-Cassegrain optical tube and the sturdy Advanced VX equatorial mount and tripod, this kit provides unparalleled views of the planets and up-close views of the lunar surface, including craters and maria.\u003c\/p\u003e\n\u003cp\u003eAstronomers located in urban areas will especially appreciate the Mak’s ability to bring out more contrast in celestial objects. But since the entire kit disassembles into separate, lightweight, and manageable pieces, it’s also a great choice for transporting to dark sky sites.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaksutov-Cassegrain Optical Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Mak is a catadioptric telescope, which means the optical design includes both a lens and a mirror. The light coming through a Mak passes through the corrector lens to the primary mirror and back to a spherical secondary mirror before it hits the eyepiece. Images are bright, sharp, and virtually free of chromatic aberration.\u003c\/p\u003e\n\u003cp\u003eThe Maksutov-Cassegrain’s optical design offers several unique benefits. Instead of a secondary mirror, the Mak features a “secondary spot” of reflective coating applied directly to the inside of the corrector plate. Because of this, the telescope does not require frequent collimation like a Schmidt-Cassegrain. Also, the secondary spot is significantly smaller than a traditional Schmidt-Cassegrain secondary mirror, giving the Mak its signature high-contrast views.\u003c\/p\u003e\n\u003cp\u003eOne important thing to note about Maksutov-Cassegrain telescopes is that the larger, heavier Maksutov corrector plate takes longer to cool down and adjust to ambient air temperature compared to a Schmidt-Cassegrain of the same aperture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced VX Mount \u0026amp; Tripod\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Advanced VX mount is designed to provide superior performance for smaller telescopes while taking advantage of Celestron’s most advanced technologies: All-Star Polar Alignment, Celestron PWI telescope control software, SkyAlign, and permanently programmable periodic error correction (PPEC).\u003c\/p\u003e\n\u003cp\u003eIf you’re an experienced imager, you’ll love taking this portable mount to a dark sky site and enjoying all the conveniences of a larger observatory mount. Or, if you’re new to imaging, Advanced VX will help you get started with the hobby and keep up with your needs for years to come.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComputerized German equatorial mount\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Advanced VX is the smallest of Celestron’s German equatorial mounts. The computerized GoTo capability automatically tracks objects as they move across the night sky. The Advanced VX mount includes ports for a hand control, an autoguider, and 2 AUX ports for optional accessories. The NexStar+ hand control gives you instant access to all the functions your mount has to offer. With automatic slewing and menu descriptions, astronomers of all skill levels can master this mount in just a few observing sessions. The Advanced VX also has an impressive tripod for its class with 2”-diameter steel tripod legs, providing an extra-wide stance for improved stability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePayload capacity\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe payload capacity for the Advanced VX is 30 lb. It offers a sturdy platform for the 7” Maksutov-Cassegrain optical tube, even when paired with optional accessories like StarSense AutoAlign, Focus Motor, a finderscope, and a camera. Celestron's payload capacity does not include the weight of the counterweights.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual saddle plate\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAs of early 2019, Advanced VX mounts now include a new dual saddle plate that accommodates both CG-5 and CGE-style dovetails. Switching between the two saddle plates is as simple as moving the hand knobs into a separate set of holes. Now you can use your Advanced VX mount not only with the 7” Mak, but virtually any optical tube within Advanced VX’s weight limit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoftware\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCelestron PWI Telescope Control Software\u003cbr\u003eYour Ultimate Astronomy Software Suite\u003c\/p\u003e\n\u003cp\u003eAll current Celestron computerized telescopes include Celestron PWI (CPWI), the most advanced astronomy software suite provided with any consumer-grade telescope. Celestron’s experts co-developed CPWI with the engineers at PlaneWave Instruments. The result is an all-in-one solution offering you many of the same features used on PlaneWave’s observatory-class telescopes.\u003c\/p\u003e\n\u003cp\u003eGraphical planetarium interface with PointXP advanced mount modelling allows you to add 100+ points to your alignment model for the most accurate pointing and tracking possible\u003cbr\u003eIdeal for remote observatory setups: save and re-load your alignment and park your scope\u003cbr\u003eProvides a complete ASCOM telescope interface to allow control of the telescope from third party software applications\u003cbr\u003eFor more information on CPWI and to see the user interface, click here.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStarry Night Software\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAlso included with your purchase is a free download of Celestron’s Starry Night Special Edition Software. This advanced software by Simulation Curriculum offers detailed information about celestial objects and helps you plan your next observing or imaging session. The Special Edition software also includes telescope control via your PC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccessories Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Advanced VX 700 Mak comes complete with a 2” Visual Back, a 2” Star Diagonal with 1.25” adapter, a 28 mm wide-field 2” eyepiece, and a large 8x50 straight-through finderscope. The optical tube accommodates the larger 2” accessories, such as 2” Barlow lenses, the 2” eyepiece and filter kit, and larger wide-field eyepieces.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e7\" (180mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2700mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e19 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e420x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMotorized Controls\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eComputerized GoTo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e66 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptical Coatings\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e.52 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplied Eyepiece\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e28mm 2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eView Finder\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e13.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe Advanced VX 700 Mak comes complete with a 2” Visual Back, a 2” Star Diagonal with 1.25” adapter, a 28 mm wide-field 2” eyepiece, and a large 8x50 straight-through finderscope. The optical tube accommodates the larger 2” accessories, such as 2” Barlow lenses, the 2” eyepiece and filter kit, and larger wide-field eyepieces.\u003c\/span\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40481987100745,"sku":"AVX7M","price":2599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/12035_advanced_vx_7_mak-cass_01_570x380_2x_37255e04-745f-4cd9-b6ef-b35429c37cf7.jpg?v=1675379776"},{"product_id":"ioptron-6-maksutov-cassegrain-optical-tube","title":"iOptron 6\" Maksutov Cassegrain Optical Tube","description":"\u003ch2 data-start=\"318\" data-end=\"437\"\u003eiOptron 6\" Rumak Maksutov-Cassegrain OTA – High-Contrast Lunar and Planetary Views Without the Refractor Price Tag\u003c\/h2\u003e\n\u003cp data-start=\"438\" data-end=\"574\"\u003e\u003cstrong data-start=\"438\" data-end=\"574\"\u003eA compact powerhouse designed for the serious planetary observer or anyone seeking high-definition views in a portable optical tube.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"576\" data-end=\"1012\"\u003eThe \u003cstrong data-start=\"580\" data-end=\"620\"\u003eiOptron 6\" Rumak Maksutov-Cassegrain\u003c\/strong\u003e optical tube offers a rare combination of \u003cstrong data-start=\"663\" data-end=\"749\"\u003erefractor-like clarity, long focal length precision, and high-contrast performance\u003c\/strong\u003e—all in a portable, rugged package that’s easy to transport and use. Whether your passion is resolving Saturn’s Cassini Division, catching subtle albedo features on Mars, or imaging the waxing gibbous Moon in crisp detail, this 150mm Maksutov-Cassegrain delivers.\u003c\/p\u003e\n\u003cp data-start=\"1014\" data-end=\"1383\"\u003eIts \u003cstrong data-start=\"1018\" data-end=\"1048\"\u003eRumak-style optical layout\u003c\/strong\u003e separates the secondary mirror from the corrector plate, allowing for \u003cstrong data-start=\"1119\" data-end=\"1163\"\u003ebetter spherical correction and contrast\u003c\/strong\u003e than Gregory-style Maksutovs. This means you’ll see sharp, pinpoint stars and cleaner planetary edges—without the chromatic aberration common in achromatic refractors and without the hefty cost of a 5\" or 6\" apochromat.\u003c\/p\u003e\n\u003chr data-start=\"1385\" data-end=\"1388\"\u003e\n\u003ch3 data-start=\"1390\" data-end=\"1468\"\u003ePerformance That Rivals a Refractor—At Half the Size and a Third the Price\u003c\/h3\u003e\n\u003cp data-start=\"1470\" data-end=\"1936\"\u003eThe 6\" iOptron MAK provides \u003cstrong data-start=\"1498\" data-end=\"1553\"\u003evisual performance comparable to a 5\" APO refractor\u003c\/strong\u003e, but without the associated price or tube length. With its \u003cstrong data-start=\"1613\" data-end=\"1633\"\u003ef\/12 focal ratio\u003c\/strong\u003e, it’s a natural fit for high-power observing of the Moon and planets, as well as double stars, globular clusters, and planetary nebulae. Its long focal length gives you magnification and image scale that wide-field scopes simply can’t match, while the compact tube makes it easy to transport and store.\u003c\/p\u003e\n\u003chr data-start=\"1938\" data-end=\"1941\"\u003e\n\u003ch3 data-start=\"1943\" data-end=\"1989\"\u003eEnhanced Mechanics Set This Maksutov Apart\u003c\/h3\u003e\n\u003cp data-start=\"1991\" data-end=\"2366\"\u003eMost Maksutov-Cassegrain scopes come with a single-speed focuser—functional, but often finicky at higher powers. The iOptron MAK150 goes a step further by including a \u003cstrong data-start=\"2158\" data-end=\"2195\"\u003edual-speed Crayford-style focuser\u003c\/strong\u003e, a rare luxury in a Maksutov. This lets you make \u003cstrong data-start=\"2245\" data-end=\"2281\"\u003efine, vibration-free adjustments\u003c\/strong\u003e, crucial for nailing perfect focus on Jupiter’s cloud bands or Saturn’s ring detail.\u003c\/p\u003e\n\u003cp data-start=\"2368\" data-end=\"2669\"\u003eiOptron also includes a \u003cstrong data-start=\"2392\" data-end=\"2426\"\u003etwist-lock aluminum dew shield\u003c\/strong\u003e, an accessory many manufacturers sell separately (if they offer it at all). The dew shield reduces thermal turbulence in front of the corrector plate and helps prevent fogging—especially useful during colder nights or long planetary sessions.\u003c\/p\u003e\n\u003chr data-start=\"2671\" data-end=\"2674\"\u003e\n\u003ch3 data-start=\"2676\" data-end=\"2704\"\u003eFeatures and Inclusions:\u003c\/h3\u003e\n\u003cul data-start=\"2705\" data-end=\"3615\"\u003e\n\u003cli data-start=\"2705\" data-end=\"2811\"\u003e\n\u003cp data-start=\"2707\" data-end=\"2811\"\u003e\u003cstrong data-start=\"2707\" data-end=\"2768\"\u003e150mm (6\") aperture Rumak-type Maksutov-Cassegrain optics\u003c\/strong\u003e for high-contrast, high-resolution views\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2812\" data-end=\"2920\"\u003e\n\u003cp data-start=\"2814\" data-end=\"2920\"\u003e\u003cstrong data-start=\"2814\" data-end=\"2856\"\u003ef\/12 focal ratio (1800mm focal length)\u003c\/strong\u003e for exceptional lunar, planetary, and double star performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2921\" data-end=\"3008\"\u003e\n\u003cp data-start=\"2923\" data-end=\"3008\"\u003e\u003cstrong data-start=\"2923\" data-end=\"2959\"\u003eBK7 optical glass primary mirror\u003c\/strong\u003e with aluminized and quartz-overcoated surfaces\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3009\" data-end=\"3109\"\u003e\n\u003cp data-start=\"3011\" data-end=\"3109\"\u003e\u003cstrong data-start=\"3011\" data-end=\"3032\"\u003eTrue Rumak design\u003c\/strong\u003e with separate secondary mirror for improved image correction and sharpness\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3110\" data-end=\"3188\"\u003e\n\u003cp data-start=\"3112\" data-end=\"3188\"\u003e\u003cstrong data-start=\"3112\" data-end=\"3149\"\u003eDual-speed Crayford-style focuser\u003c\/strong\u003e for both coarse and fine adjustments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3189\" data-end=\"3255\"\u003e\n\u003cp data-start=\"3191\" data-end=\"3255\"\u003e\u003cstrong data-start=\"3191\" data-end=\"3225\"\u003eTwist-lock aluminum dew shield\u003c\/strong\u003e for thermal and dew control\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3256\" data-end=\"3355\"\u003e\n\u003cp data-start=\"3258\" data-end=\"3355\"\u003e\u003cstrong data-start=\"3258\" data-end=\"3296\"\u003eVixen-style dovetail mounting rail\u003c\/strong\u003e for compatibility with most equatorial and alt-az mounts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3356\" data-end=\"3424\"\u003e\n\u003cp data-start=\"3358\" data-end=\"3424\"\u003e\u003cstrong data-start=\"3358\" data-end=\"3395\"\u003e8x50 straight-through finderscope\u003c\/strong\u003e with quick-release bracket\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3425\" data-end=\"3474\"\u003e\n\u003cp data-start=\"3427\" data-end=\"3474\"\u003e\u003cstrong data-start=\"3427\" data-end=\"3445\"\u003eT-ring adapter\u003c\/strong\u003e for DSLR camera connection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3475\" data-end=\"3583\"\u003e\n\u003cp data-start=\"3477\" data-end=\"3583\"\u003e\u003cstrong data-start=\"3477\" data-end=\"3523\"\u003eAdapter for Schmidt-Cassegrain accessories\u003c\/strong\u003e (use your existing diagonals, reducers, or filter wheels)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3584\" data-end=\"3615\"\u003e\n\u003cp data-start=\"3586\" data-end=\"3615\"\u003e\u003cstrong data-start=\"3586\" data-end=\"3615\"\u003eOne-year limited warranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3617\" data-end=\"3620\"\u003e\n\u003ch3 data-start=\"3622\" data-end=\"3642\"\u003eObserving Tip:\u003c\/h3\u003e\n\u003cp data-start=\"3643\" data-end=\"4027\"\u003eLet your Maksutov cool down! Maksutov-Cassegrains are sealed designs, which makes them rugged and low-maintenance—but they benefit from thermal equilibrium. Give the scope 30–45 minutes to acclimate to outdoor temps before pushing high magnification. And for best lunar and planetary results, use quality Plössl, Abbe orthoscopic, or dedicated planetary eyepieces in the 7–12mm range.\u003c\/p\u003e\n\u003chr data-start=\"4029\" data-end=\"4032\"\u003e\n\u003ch3 data-start=\"4034\" data-end=\"4055\"\u003eFinal Thoughts:\u003c\/h3\u003e\n\u003cp data-start=\"4056\" data-end=\"4604\"\u003eIf you’ve been hunting for a telescope that can resolve fine planetary detail, split tight double stars, and deliver high-contrast views—without the size, weight, or cost of an APO refractor—the \u003cstrong data-start=\"4251\" data-end=\"4291\"\u003eiOptron 6\" Rumak Maksutov-Cassegrain\u003c\/strong\u003e hits the sweet spot. It’s portable, refined, and powerful, with mechanical upgrades that set it apart from typical Maks. Whether you’re a lunar sketcher, a planetary imager, or a visual observer who wants a grab-and-go scope with serious optics, the 6101M offers more performance than you'd expect at this price.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"206\" align=\"right\"\u003eLens Type\u003c\/td\u003e\n\u003ctd width=\"396\" align=\"center\"\u003eCatadioptric Rumak style Maksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e1800mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd align=\"center\"\u003ef\/12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eResolving Power\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e0.77 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eVisual Limiting Magnitude\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e12.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eHighest Magnification\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e300X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFinder scope\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e8x50 w\/ finder ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eTwist-lock aluminum shield\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eDual speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e21 3\/4” (Without dew shield) 27 1\/8” (With dew shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e13.4 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eAstrophotography\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eT-ring adapter included for attaching a camera\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eOther Accessories\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e2” to 1.25” compression ring accessory holders;\u003cbr\u003eAdapter Ring for Schmidt-Cass Accessories\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eDust Cover\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eLight reducing lens cover\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eGross Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e22 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eWarranty\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eOne year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e150mm (6\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1800mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":40481990344777,"sku":"6101M","price":749.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/6101-2t.jpg?v=1675379954"},{"product_id":"celestron-7-maksutov-cassegrain-ota","title":"Celestron 7\" Maksutov Cassegrain OTA","description":"\u003ch3 data-start=\"185\" data-end=\"236\"\u003eCelestron 7\" Maksutov-Cassegrain OTA (#91012)\u003c\/h3\u003e\n\u003cp data-start=\"237\" data-end=\"291\"\u003e\u003cstrong data-start=\"237\" data-end=\"291\"\u003eHigh Contrast. High Resolution. High Satisfaction.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"293\" data-end=\"682\"\u003eThere’s something undeniably special about the \u003cstrong data-start=\"340\" data-end=\"376\"\u003eCelestron 7\" Maksutov-Cassegrain\u003c\/strong\u003e. It’s not just the long focal length or the razor-sharp optics—it’s the whole observing experience. Whether you’re splitting double stars, chasing planetary detail, or scanning the Moon’s rugged landscape crater by crater, this instrument delivers contrast and clarity that other scopes struggle to match.\u003c\/p\u003e\n\u003cp data-start=\"684\" data-end=\"865\"\u003eThis is a telescope built for observers who crave \u003cstrong data-start=\"734\" data-end=\"759\"\u003edetail and definition\u003c\/strong\u003e over ultra-wide fields—urban astronomers, planetary imagers, and lunar enthusiasts, we’re talking to you.\u003c\/p\u003e\n\u003chr data-start=\"867\" data-end=\"870\"\u003e\n\u003ch3 data-start=\"872\" data-end=\"915\"\u003eA Rare Opportunity to Own the OTA Alone\u003c\/h3\u003e\n\u003cp data-start=\"917\" data-end=\"1258\"\u003eCelestron does not offer the 7\" Mak as a standalone OTA. It’s only sold as part of a complete mount package. But on rare occasions—like this one—we receive the mount\/OTA combo and make the OTA available separately. If you've ever dreamed of owning this optical powerhouse without paying for an entire setup you don’t need, now’s your chance.\u003c\/p\u003e\n\u003chr data-start=\"1260\" data-end=\"1263\"\u003e\n\u003ch3 data-start=\"1265\" data-end=\"1306\"\u003eMaksutov-Cassegrain: Contrast is King\u003c\/h3\u003e\n\u003cp data-start=\"1308\" data-end=\"1645\"\u003eAt the heart of this telescope is a \u003cstrong data-start=\"1344\" data-end=\"1389\"\u003e180mm aperture with a 2700mm focal length\u003c\/strong\u003e, giving it an \u003cstrong data-start=\"1404\" data-end=\"1424\"\u003ef\/15 focal ratio\u003c\/strong\u003e. The optical design is classic Maksutov-Cassegrain: a catadioptric system using a \u003cstrong data-start=\"1507\" data-end=\"1535\"\u003emeniscus corrector plate\u003c\/strong\u003e, \u003cstrong data-start=\"1537\" data-end=\"1565\"\u003espherical primary mirror\u003c\/strong\u003e, and a \u003cstrong data-start=\"1573\" data-end=\"1591\"\u003esecondary spot\u003c\/strong\u003e that’s applied directly to the back of the corrector.\u003c\/p\u003e\n\u003cp data-start=\"1647\" data-end=\"1674\"\u003eWhat makes this so special?\u003c\/p\u003e\n\u003cul data-start=\"1676\" data-end=\"2200\"\u003e\n\u003cli data-start=\"1676\" data-end=\"1837\"\u003e\n\u003cp data-start=\"1678\" data-end=\"1837\"\u003e\u003cstrong data-start=\"1678\" data-end=\"1705\"\u003eInfrequent Collimation:\u003c\/strong\u003e With no adjustable secondary mirror, the Mak holds collimation extremely well—ideal for those who prefer observing over tweaking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1838\" data-end=\"2072\"\u003e\n\u003cp data-start=\"1840\" data-end=\"2072\"\u003e\u003cstrong data-start=\"1840\" data-end=\"1870\"\u003eHigh Contrast Performance:\u003c\/strong\u003e The smaller secondary obstruction (just \u003cstrong data-start=\"1911\" data-end=\"1932\"\u003e23.3% by diameter\u003c\/strong\u003e) results in higher contrast than comparably sized Schmidt-Cassegrains—critical when observing planetary features or subtle lunar shading.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2073\" data-end=\"2200\"\u003e\n\u003cp data-start=\"2075\" data-end=\"2200\"\u003e\u003cstrong data-start=\"2075\" data-end=\"2103\"\u003eNo Chromatic Aberration:\u003c\/strong\u003e As a reflective\/refractive system, the Mak delivers sharp, color-pure views across the spectrum.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2202\" data-end=\"2392\"\u003eThe only tradeoff is \u003cstrong data-start=\"2223\" data-end=\"2240\"\u003ecooldown time\u003c\/strong\u003e. That thick corrector plate takes a while to reach thermal equilibrium, especially in colder climates. But once it does—the views speak for themselves.\u003c\/p\u003e\n\u003chr data-start=\"2394\" data-end=\"2397\"\u003e\n\u003ch3 data-start=\"2399\" data-end=\"2448\"\u003eExcellent for Visual and Narrow-Field Imaging\u003c\/h3\u003e\n\u003cp data-start=\"2450\" data-end=\"2546\"\u003eThis scope excels in applications that benefit from long focal lengths and tight fields of view:\u003c\/p\u003e\n\u003cul data-start=\"2548\" data-end=\"2883\"\u003e\n\u003cli data-start=\"2548\" data-end=\"2669\"\u003e\n\u003cp data-start=\"2550\" data-end=\"2669\"\u003e\u003cstrong data-start=\"2550\" data-end=\"2561\"\u003ePlanets\u003c\/strong\u003e: You’ll see Saturn’s Cassini Division, Jupiter’s festoons, and Mars’ polar caps with stunning definition.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2670\" data-end=\"2778\"\u003e\n\u003cp data-start=\"2672\" data-end=\"2778\"\u003e\u003cstrong data-start=\"2672\" data-end=\"2688\"\u003eDouble Stars\u003c\/strong\u003e: With \u003cstrong data-start=\"2695\" data-end=\"2740\"\u003e0.64\" Rayleigh and 0.52\" Dawes resolution\u003c\/strong\u003e, it’s a double star hunter’s dream.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2779\" data-end=\"2883\"\u003e\n\u003cp data-start=\"2781\" data-end=\"2883\"\u003e\u003cstrong data-start=\"2781\" data-end=\"2793\"\u003eThe Moon\u003c\/strong\u003e: Craters, rilles, and mountain ranges appear with photographic sharpness—no exaggeration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2885\" data-end=\"2888\"\u003e\n\u003ch3 data-start=\"2890\" data-end=\"2914\"\u003eIncluded Accessories\u003c\/h3\u003e\n\u003cp data-start=\"2916\" data-end=\"2953\"\u003eThis OTA comes ready to observe with:\u003c\/p\u003e\n\u003cul data-start=\"2955\" data-end=\"3195\"\u003e\n\u003cli data-start=\"2955\" data-end=\"2977\"\u003e\n\u003cp data-start=\"2957\" data-end=\"2977\"\u003e\u003cstrong data-start=\"2957\" data-end=\"2975\"\u003e2\" Visual Back\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2978\" data-end=\"3021\"\u003e\n\u003cp data-start=\"2980\" data-end=\"3021\"\u003e\u003cstrong data-start=\"2980\" data-end=\"3019\"\u003e2\" Star Diagonal with 1.25\" Adapter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3022\" data-end=\"3077\"\u003e\n\u003cp data-start=\"3024\" data-end=\"3077\"\u003e\u003cstrong data-start=\"3024\" data-end=\"3055\"\u003e28mm 2\" Wide-Field Eyepiece\u003c\/strong\u003e (96x magnification)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3078\" data-end=\"3119\"\u003e\n\u003cp data-start=\"3080\" data-end=\"3119\"\u003e\u003cstrong data-start=\"3080\" data-end=\"3117\"\u003e8x50 Straight-Through Finderscope\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3120\" data-end=\"3195\"\u003e\n\u003cp data-start=\"3122\" data-end=\"3195\"\u003e\u003cstrong data-start=\"3122\" data-end=\"3149\"\u003eCGE-style Dovetail Rail\u003c\/strong\u003e for mounting on compatible equatorial systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3197\" data-end=\"3327\"\u003eThe entire tube assembly is constructed from aluminum and weighs in at \u003cstrong data-start=\"3268\" data-end=\"3278\"\u003e19 lbs\u003c\/strong\u003e, making it highly manageable and mount-friendly.\u003c\/p\u003e\n\u003chr data-start=\"3329\" data-end=\"3332\"\u003e\n\u003ch3 data-start=\"3334\" data-end=\"3352\"\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp data-start=\"3354\" data-end=\"3687\"\u003eThe \u003cstrong data-start=\"3358\" data-end=\"3398\"\u003eCelestron 7\" Maksutov-Cassegrain OTA\u003c\/strong\u003e is a specialized instrument that fills a unique niche—one that prioritizes \u003cstrong data-start=\"3474\" data-end=\"3524\"\u003ehigh-resolution, high-contrast, pinpoint views\u003c\/strong\u003e over wide-field sweeping. It’s built for those who appreciate optical precision and planetary finesse, whether from light-polluted backyards or dark-sky retreats.\u003c\/p\u003e\n\u003cp data-start=\"3689\" data-end=\"3809\"\u003eIf you’ve been waiting for an opportunity to own one of the finest mid-sized Maks ever made, don’t let this one pass by.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-specs-list\" class=\"table-open\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Deisgn:\u003c\/td\u003e\n\u003ctd\u003eMaksutov-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e180mm (7.08\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e2700mm (106.3\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio:\u003c\/td\u003e\n\u003ctd\u003ef\/15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e28mm (1.1\") 2\" eyepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1:\u003c\/td\u003e\n\u003ctd\u003e96x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope:\u003c\/td\u003e\n\u003ctd\u003e8x50 Straight Through\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal:\u003c\/td\u003e\n\u003ctd\u003e2\" Star Diagonal with 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube:\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e420x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification:\u003c\/td\u003e\n\u003ctd\u003e67x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude:\u003c\/td\u003e\n\u003ctd\u003e13.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh):\u003c\/td\u003e\n\u003ctd\u003e0.64 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes):\u003c\/td\u003e\n\u003ctd\u003e0.52 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye):\u003c\/td\u003e\n\u003ctd\u003e661x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Obstruction Diameter:\u003c\/td\u003e\n\u003ctd\u003e42mm (1.65\") (5.45% of aperture area; 23.3% by diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings:\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length:\u003c\/td\u003e\n\u003ctd\u003e571.5mm (22.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter:\u003c\/td\u003e\n\u003ctd\u003e222.25mm (8.75\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight:\u003c\/td\u003e\n\u003ctd\u003e19 lbs (8.6 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail:\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":41403591655497,"sku":"91012","price":1600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/image_e229e683-8c66-471f-a96b-e537eba0df5c.jpg?v=1716197948"},{"product_id":"spectrum-optics-mirrosky-skypilot-sp127-smart-telescope","title":"Spectrum Optics MirroSky SkyPilot SP127 Smart Telescope","description":"\u003ch1\u003eSpectrum Optics MirroSky SkyPilot SP127 Smart Telescope\u003c\/h1\u003e\n\u003cp\u003e\u003cem\u003eA New Way to Explore the Night Sky — Smart Guidance, Classic Glass\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe MirroSky SkyPilot SP127 is Spectrum Optics' answer to a question many observers have asked for years: \u003cem\u003eWhy can’t a smart telescope also be a real telescope?\u003c\/em\u003e\u003cbr\u003eMost app-driven instruments trade optics for convenience. The SP127 takes the opposite approach. It begins with a time-honored 127 mm f\/15 Maksutov-Cassegrain—an optical design prized for crisp planetary detail, clean star separation, and remarkable contrast—and pairs it with an intelligent imaging system that does the locating, calibrating, and guiding for you.\u003c\/p\u003e\n\u003cp\u003eThe result is a telescope that feels steeped in tradition yet refreshingly modern: a true visual instrument supported by a remarkably capable smart assistant.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eA Dual-Tube System Designed for Real Observing\u003c\/h2\u003e\n\u003cp\u003eAt first glance, the SkyPilot SP127 looks unlike other smart scopes. Alongside the Maksutov optics sits a compact 53 mm ED refractor housing a Sony IMX662 imaging sensor. This guides the system, handles plate solving, and collects images while you look through the main telescope the way nature intended—through an eyepiece.\u003c\/p\u003e\n\u003cp\u003eThis dual-tube architecture means you never have to choose between visual observing and automated imaging.\u003c\/p\u003e\n\u003cp\u003eYou get both, working in harmony.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eIntelligence Built Into the Mount\u003c\/h2\u003e\n\u003cp\u003eThe SkyPilot’s motorized alt-azimuth mount contains its own level and electronic compass. Once powered on, it quietly determines its orientation and position, sparing you the steps that usually slow down a night under the stars.\u003c\/p\u003e\n\u003cp\u003eThere’s no polar alignment.\u003cbr\u003eNo star-hopping.\u003cbr\u003eNo setup routine that feels like a chore.\u003c\/p\u003e\n\u003cp\u003eYou simply connect your smart device to the telescope’s WiFi network and open the MirroSky app. A full, interactive planetarium appears. Select your target, confirm your choice, and the system takes over like a seasoned guide—slewing, plate-solving, and tightening its own accuracy until your object is centered and ready.\u003c\/p\u003e\n\u003cp\u003eIt’s astronomy without barriers.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eObserve Through the Eyepiece. Image Through the App.\u003c\/h2\u003e\n\u003cp\u003eOnce your target is acquired, the 127 mm Maksutov shows you the sky as only fine optics can. Lunar mountain ranges fall into sharp relief. Jupiter shows belts and storms. Saturn presents a razor-edged ring. Even deep-sky objects appear cleaner than you expect from a compact instrument.\u003c\/p\u003e\n\u003cp\u003eMeanwhile, the camera tube captures your target in real time. Through the app, you control exposure length, gain setting, and frame count. You can keep things simple or add dark frames for cleaner stacked results. Families will enjoy the live view on a phone or tablet; seasoned observers will appreciate the hands-off precision.\u003c\/p\u003e\n\u003cp\u003eBoth experiences work in parallel without compromising either one.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eA System That Forgives the Small Mistakes\u003c\/h2\u003e\n\u003cp\u003eEvery observer—no matter how careful—occasionally bumps a telescope during an eyepiece change or while adjusting the tripod. With traditional GoTo mounts, that mistake can unravel your alignment.\u003c\/p\u003e\n\u003cp\u003eThe SkyPilot SP127 simply recalibrates.\u003cbr\u003eNudge it gently back toward the target, tap GoTo again, and the system re-centers itself using its camera and plate-solving intelligence. You return to observing in seconds rather than minutes.\u003c\/p\u003e\n\u003cp\u003eIt’s the kind of quiet engineering touch that makes a telescope feel friendly.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eReady for Home or the Road\u003c\/h2\u003e\n\u003cp\u003eThe SkyPilot SP127 is compact, surprisingly light, and thoughtfully packed.  Whether you’re heading to a dark-sky site or simply stepping out into the backyard between clouds, it is a telescope designed to be used often—not one that gathers dust between rare clear nights.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eObserving Tip\u003c\/h1\u003e\n\u003cp\u003eA 127 mm Maksutov excels at magnification and contrast. For lunar viewing, use a 10–12 mm eyepiece to reveal crisp crater walls and mountain shadows. For Saturn and Jupiter, an 8–10 mm eyepiece will show impressive detail under steady skies. When touring deep-sky objects, a 30–32 mm Plössl offers a comfortable, bright, wide-field view that pairs beautifully with the SP127’s tracking accuracy.\u003c\/p\u003e\n\u003cp\u003eLet the smart system handle the navigating. The view through the eyepiece is the reward.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eOptical Tube:\u003c\/strong\u003e 127 mm Maksutov-Cassegrain\u003cbr\u003e\u003cstrong\u003eFocal Length:\u003c\/strong\u003e 1900 mm\u003cbr\u003e\u003cstrong\u003eFocal Ratio:\u003c\/strong\u003e f\/15\u003cbr\u003e\u003cstrong\u003eImaging Guidescope:\u003c\/strong\u003e 53 mm ED refractor with Sony IMX662 CMOS camera\u003cbr\u003e\u003cstrong\u003eMount:\u003c\/strong\u003e Motorized alt-azimuth with automatic leveling and compass\u003cbr\u003e\u003cstrong\u003eAlignment:\u003c\/strong\u003e Fully automatic (platesolving; no star alignment needed)\u003cbr\u003e\u003cstrong\u003eConnectivity:\u003c\/strong\u003e Built-in WiFi (connects directly to your smart device)\u003cbr\u003e\u003cstrong\u003eControl App:\u003c\/strong\u003e MirroSky App (iOS\/Android)\u003cbr\u003e\u003cstrong\u003eDatabase:\u003c\/strong\u003e 100,000+ objects\u003cbr\u003e\u003cstrong\u003ePower:\u003c\/strong\u003e Internal rechargeable battery + AC adapter\u003cbr\u003e\u003cstrong\u003eTripod:\u003c\/strong\u003e Full-size adjustable steel-leg tripod\u003cbr\u003e\u003cstrong\u003eEyepiece Included:\u003c\/strong\u003e 25 mm Plössl\u003c\/p\u003e","brand":"Spectrum Optics","offers":[{"title":"Default Title","offer_id":54511528869961,"sku":"MS35122X","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/2_4fdf90ba-da52-4d98-9776-d847146fc164.webp?v=1749057581"}],"url":"https:\/\/astronomics.com\/collections\/maksutov-cassegrains.oembed?page=3","provider":"Astronomics","version":"1.0","type":"link"}