{"title":"Astro-Tech Sales","description":null,"products":[{"product_id":"astro-tech-at80edt-f-6-ed-triplet-refractor-ota","title":"Astro-Tech AT80EDT f\/6 ED Triplet Refractor OTA","description":"\u003cp\u003eFor the backyard grab-and-go observer, for the Milky Way star field scanner, for the wide field imager, for the birder and terrestrial photographer the Astro-Tech AT80EDT 80mm f\/6 ED triplet apo is the Swiss Army knife of refractors.\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003eIn 2024 we looked at the landscape of refractors and decided that somethings might need some improvements.  Optically the Astro-Tech EDT still provided what astronomers have come to love about our refractors...performance and value.  We just felt that some mechanical upgrades would be a welcome addition to them.  For the 80EDT it meant visiting the focuser, rings, and internal baffles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Astro-Tech AT80EDT has:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e80mm f\/6 fully multicoated triplet apochromatic optics using an FK-61 ED center element \u003c\/li\u003e\n\u003cli\u003ea dual-speed 2.8\" CNC rotatable rack-and-pinion focuser with 10:1 ratio fine focuser \u003c\/li\u003e\n\u003cli\u003ean upgraded camera angle adjuster\u003c\/li\u003e\n\u003cli\u003edurable nylon soft carry case \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eretractable lens shade\/dew shield\u003c\/li\u003e\n\u003cli\u003edual hinged split tube rings\u003c\/li\u003e\n\u003cli\u003e a Vixen-style dovetail\u003c\/li\u003e\n\u003cli\u003edual vixen finder shoes on the focuser body\u003c\/li\u003e\n\u003cli\u003ea top mounted handle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor grab-and-go observing, Milky Way star field sweeping, and wide field astrophotography (as well an terrestrial observing and photography), many observers swear by a good fast focal ratio 80mm refractor. The 6.5 pound 80mm f\/6 Astro-Tech AT80EDT ED triplet apo refractor is just that scope. It does it all.\u003c\/p\u003e\n\u003cp\u003eThe Astro-Tech AT80EDT's slow-polished triplet optics, FK-61 ED glass center element, and state-of-the-art optical multicoatings are even more impressive when you consider the package they come in. The finely-machined scope has a dual-speed 2.8\" rack-and-pinion focuser with a microfine 10:1 fine-focusing ratio. A built-in camera angle adjuster lets you fine-tune the composition of your astrophotos and the orientation of your equipment. The supplied 2\" and 1.25\" eyepiece holders use non-marring compression rings that won't scratch your eyepiece barrels. It even comes with a finder shoe, tube rings, and a dovetail plate.\u003c\/p\u003e\n\u003cp\u003eThis feature-laden 80mm Astro-Tech AT80EDT ED triplet apochromatic refractor offers exceptional optical and mechanical performance and features at a very reasonable price. It will do just about anything you want to do with a truly portable scope. Let it into your telescope family and you may never want to let it go.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures of this Telescope . . .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eED apochromatic triplet refractor optics: \u003c\/strong\u003e80mm (3.15\") aperture, 480mm focal length, f\/6 focal ratio. It uses an ED (Extra-low Dispersion glass) center element to reduce spurious color halos and fringing to vanishingly low levels. All three lens elements are slow-polished for smooth surfaces, with less scattered light.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFully multicoated optics: \u003c\/strong\u003eThe triplet objective lens has the latest state-of-the-art antireflection multicoatings on all air-to-glass surfaces for high light transmission and excellent contrast. This can easily be seen by looking into the objective lens of the scope. Virtually no reflection of your face will be seen. It's a sure sign that the high transmission coatings are doing their job, by letting virtually all the light enter the scope, rather than reflecting some light back to your eye.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal light baffles:\u003c\/strong\u003e Contrast-enhancing knife-edge light baffles in the 90mm diameter optical tube provide truly dark sky backgrounds and high terrestrial contrast. The edges of the lenses are blackened to reduce internal reflections and further improve image contrast.  When we went with the new 2.8\" CNC focuser in late 2024 we improved the baffle design as well.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDew shield:\u003c\/strong\u003e A self-storing retractable dew shield slows the formation of dew on the lens in cold weather to extend your undisturbed observing time. It also improves the contrast, similar to the effect of the lens shade on a camera lens, when observing during the day or when there is excessive ambient light at night, such as from a neighbor's backyard security light.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDual speed 2.8\" rotating rack-and-pinion focuser:\u003c\/strong\u003e The precision-made CNC focuser has dual-speed focusing. There are two coarse focusing knobs. The right knob also has a smaller concentric knob with a 10:1 reduction gear microfine focusing ratio. This provides exceptionally precise image control during high magnification visual observing and critical CCD imaging.\u003c\/p\u003e\n\u003cp\u003eThe focus knobs have ribbed gripping surfaces so they are easy to operate, even while wearing gloves or mittens in cold weather. The focuser drawtube has 75mm of travel and a millimeter scale on the drawtube to let you return to an approximate focus when switching between visual and photographic setups. A lock knob under the focuser lets you lock in your photographic focus.\u003c\/p\u003e\n\u003cp\u003eThe focuser also comes with two vixen style finder shoes attached to the focuser body as standard equipment.  This will allow you to mount a vixen finder bracket or any accessory that uses a vixen style finder bracket.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompression ring eyepiece holders:\u003c\/strong\u003e The focuser's 2.5\" drawtube terminates in a 2\" eyepiece holder that uses a non-marring compression ring to hold the standard equipment 2\" star diagonal and\/or accessories in place. The compression ring won't scratch the barrel of your star diagonal and accessories as an ordinary thumbscrew can.\u003c\/p\u003e\n\u003cp\u003eA supplied 1.25\" accessory adapter slips into the 2\" eyepiece holder to let you use a 1.25\" star diagonal, image erecting diagonal, or photographic accessories. Like the 2\" eyepiece holder, the 1.25\" adapter also uses a non-marring compression ring to hold 1.25\" star diagonals and accessories in place.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt-in camera angle adjuster:\u003c\/strong\u003e The focuser drawtube's 2\" eyepiece\/accessory holder includes a built-in camera angle adjuster that lets you quickly adjust the angle of your camera for the best composition or to put the star diagonal at the most comfortable observing angle. A knob on the 2\" eyepiece\/accessory holder lets you unlock the camera angle adjuster, rotate it to the desired final angle, then lock it in place at whatever angle is most convenient for you. This camera angle adjuster is standard equipment, not an optional extra-cost accessory, as it is with some other scopes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptical tube:\u003c\/strong\u003e The very compact 15\" long optical tube and focuser (17\" long with lens shade extended) are finished in a durable white finish, with grey trim. There is a finderscope mounting shoe that accepts Vixen-style finderscope mounting brackets. The shoe can be mounted on either the top left or top right side of the focuser body. A slip-on metal dust cap is standard, as is a dust seal for the eyepiece holder.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTube rings and dovetail:\u003c\/strong\u003e Dual split hinged tube rings are supplied for the 90mm o. d. optical tube. The rings are lined with white felt that will not stain the white finish of the scope over time, unlike the black felt supplied with other scopes. A 5.4\" long Vixen-style dovetail is bolted to the tube rings. Optional Losmandy-style D-plate dovetails are available if your mount uses a wider Losmandy-style saddle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCarry handle:  \u003c\/strong\u003eThe AT80EDT also comes with a top mounted carry handle to make mounting and moving your telescope a breeze. The handle will also allow vixen style DVAs to mount to it so accessories can be added directly to the top.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"max-width: 500px;\" id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e480mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e160x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5.5 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003e\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eResolution\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1.45 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eRefractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\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":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481978318921,"sku":"AT80EDT","price":999.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT80EDT_1-9533.jpg?v=1731697622"},{"product_id":"astro-tech-at115edt-f-7-ed-triplet-refractor-ota","title":"Astro-Tech AT115EDT f\/7 ED Triplet Refractor OTA","description":"\u003cp\u003eThere's a moment in every refractor owner's life when the view snaps into focus and the background goes black — truly black, the way only a well-corrected triplet delivers it — and whatever you're looking at just hangs there in space, pinpoint and still, with a clarity that makes you forget you're looking through glass at all. The AT115EDT is a 115mm f\/7 ED triplet that exists to deliver that moment, night after night, without costing what a premium APO costs. It won't do everything. It won't hunt down magnitude-14 galaxies or replace a 12-inch Dob for faint fuzzies. But for planets, the Moon, double stars, bright deep-sky, and serious astrophotography, it does what refractors do better than any other optical design — and at 115mm, it gathers over 27% more light than the 102mm refractors it often sits next to on the shelf.\u003c\/p\u003e\n\u003ch3\u003eThe Optics\u003c\/h3\u003e\n\u003cp\u003eTriplet apochromatic with an FK-61 ED center element — that's Schott's FPL-51 equivalent, slow-polished for smooth surfaces and low scattered light. Three lens elements, fully multicoated on all air-to-glass surfaces. The result is what refractor people are actually paying for: high contrast, pinpoint stars, and virtually no chromatic aberration at the focal plane. At 805mm focal length and f\/7, the AT115EDT is fast enough for efficient imaging but slow enough to be forgiving on eyepiece quality. The internal light baffles are knife-edge design, and the lens edges are blackened — both details that contribute to the deep, dark sky backgrounds this scope is known for.  Ed Ting's review on Cloudy Nights noted the AT115EDT delivered excellent views of planets, the Moon, and double stars — and called it a strong recommendation. \u003c\/p\u003e\n\u003ch3\u003eThe Focuser\u003c\/h3\u003e\n\u003cp\u003eThis is where the AT115EDT quietly separates itself from competitors in its price class. The 3.2\" dual-speed rack-and-pinion focuser has two coarse focusing knobs and a concentric 10:1 fine-focus microknob. Ninety-five millimeters of travel with a millimeter scale on the drawtube for repeatable photographic focus. A lock knob underneath holds your position. One Cloudy Nights member tested the focuser by loading a 2\" diagonal, a 28mm UWA eyepiece, and an actual brick onto the drawtube — 8.2 pounds total. He could position the focuser anywhere and it held, with the fine-focus knob still raising and lowering the load with precision. You will not need to do this. But knowing you could says something about the mechanical quality.\u003c\/p\u003e\n\u003cp\u003eThe focuser rotates a full 360° for camera framing — loosen the knob on top, rotate to your desired angle, tighten. The 2\" eyepiece holder includes a built-in camera angle adjuster for fine compositional tweaks without disturbing the heavier focuser body. Both 2\" and 1.25\" holders use compression rings, not thumbscrews, so your eyepiece and diagonal barrels stay unmarred. These are features that show up on scopes costing significantly more. On the AT115EDT, they're standard.\u003c\/p\u003e\n\u003ch3\u003eThe Tube and Rings\u003c\/h3\u003e\n\u003cp\u003eThe 114mm diameter optical tube is finished in white with grey anodized trim — clean, professional, durable. At 27.25\" long (32.4\" with the retractable dew shield extended), it's compact enough for travel and short enough to balance well on a mid-weight equatorial mount. Total weight with rings, handle, and Losmandy dovetail: 15.25 pounds. \u003c\/p\u003e\n\u003cp\u003eThe dual split hinged CNC tube rings are lined with white felt (not black, which can stain white tubes over time). A Losmandy-style dovetail bolts to the rings with a carry handle on top. Two Vixen-style finderscope shoes are mounted on the tube. A slip-on metal dust cap protects the objective, and a dust seal covers the eyepiece holder. The scope also has full collimation capability — three pairs of collimation screws sit under the silver collar at the back of the dew shield.\u003c\/p\u003e\n\u003ch3\u003eAstrophotography\u003c\/h3\u003e\n\u003cp\u003eAt f\/7 with 805mm of focal length, the AT115EDT is a serious imaging platform. The focal ratio is fast enough for reasonable exposure times on deep-sky targets but slow enough that stars stay tight across the field without a corrector for visual work. For imaging, pair it with the dedicated 0.8x reducer\/flattener to drop to f\/5.6 and 644mm — a faster, wider-field imaging configuration with a flat, corrected field across APS-C and full-frame sensors. A 1x field flattener is also available for full focal length imaging with flat stars to the corners.\u003c\/p\u003e\n\u003cp\u003eThe camera angle adjuster, compression rings, and rotatable focuser make photographic setup faster and more precise than scopes that lack these features. The focuser's 95mm of travel accommodates virtually any diagonal, camera, and accessory combination without running out of in-focus or needing extension tubes — a versatility that owners consistently praise.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech AT115EDT 115mm f\/7 ED triplet refractor OTA\u003c\/li\u003e\n\u003cli\u003eDual split hinged CNC tube rings with white felt lining\u003c\/li\u003e\n\u003cli\u003eLosmandy-style dovetail plate with carry handle\u003c\/li\u003e\n\u003cli\u003e2\" eyepiece holder with compression ring and camera angle adjuster\u003c\/li\u003e\n\u003cli\u003e1.25\" adapter with compression ring\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield\u003c\/li\u003e\n\u003cli\u003eMetal dust cap and eyepiece holder dust seal\u003c\/li\u003e\n\u003cli\u003eSoft-sided heavy-duty nylon carry case with foam cutouts for 7 accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e115mm (4.53\") FK-61 ED triplet optics\u003c\/strong\u003e — Over 27% more light-gathering than a 102mm refractor. Slow-polished triplet with fully multicoated surfaces for high contrast, pinpoint stars, and minimal chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.2\" dual-speed rack-and-pinion focuser\u003c\/strong\u003e — 10:1 fine-focus ratio, 75mm travel, mm scale, lock knob. Proven to hold 8+ pounds without slipping. The mechanical heart of the telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° rotatable focuser\u003c\/strong\u003e — Frame your camera or position your diagonal at any angle without moving the scope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in camera angle adjuster\u003c\/strong\u003e — Fine-tune composition without disturbing the focuser. Standard equipment, not an optional extra.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression ring eyepiece holders\u003c\/strong\u003e — 2\" and 1.25\". No thumbscrews to mar your eyepiece or diagonal barrels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnife-edge internal baffles\u003c\/strong\u003e — Deep contrast and dark sky backgrounds. Blackened lens edges reduce internal scatter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable dew shield\u003c\/strong\u003e — Slows dew formation and shields the objective from ambient light. Stores flat against the tube for transport.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLosmandy dovetail and CNC tube rings\u003c\/strong\u003e — White felt lined rings, carry handle. Ready for Losmandy and compatible saddles out of the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft carry case with accessory storage\u003c\/strong\u003e — Heavy-duty nylon case with paper pockets and foam cutouts for 7 accessories. Everything travels in one bag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull collimation capability\u003c\/strong\u003e — Three pairs of collimation screws under the dew shield collar. You'll probably never need them, but they're there.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eJupiter at 160x (5mm eyepiece) in the AT115EDT shows the two main equatorial belts with festoons, barges, and the Great Red Spot as a definite salmon-colored oval — not just a smudge, but a feature with shape and internal structure on a steady night. Push to 200x on the best evenings and the belts begin to show scalloping and rifts. Four or five belts become visible at the limits of the seeing. The Galilean moons show disks, not points. The contrast of a well-corrected triplet makes the difference here — the belts are sharply defined against the zones, with none of the scattered light that softens the view in lesser optics.\u003c\/p\u003e\n\u003cp\u003eSaturn at 160x shows Cassini's Division as a clean dark gap, not a thin line. The shadow of the globe on the rings is crisp. The crepe ring is visible against the globe on transparent nights. Titan is obvious; two or three fainter moons show up with averted vision.\u003c\/p\u003e\n\u003cp\u003eThe Moon is where refractors earn their keep, and the AT115EDT delivers. At 200x, the terminator is alive with shadow detail — crater walls catching the first light, rilles threading across mare floors, the Straight Wall casting its knife-edge shadow. You're seeing the kind of sharpness and contrast that made refractors the instrument of choice for lunar and planetary observers for four centuries.\u003c\/p\u003e\n\u003cp\u003eDouble stars are a refractor specialty. Albireo splits into gold and blue at any magnification. Epsilon Lyrae — the Double Double — cleanly resolves all four components at 200x. At 1.01 arc seconds of resolution, the AT115EDT handles tight pairs that would challenge many 4-inch scopes.\u003c\/p\u003e\n\u003cp\u003eDeep-sky is real but bounded by aperture. The Ring Nebula (M57) shows its annular shape clearly. M13 resolves to individual stars across the face. The Andromeda Galaxy stretches across the field at low power with dark lanes visible on a good night. The Double Cluster in Perseus is a showpiece — dozens of stars scattered across the field with a clarity that only a refractor delivers. What you won't get: the faintest galaxies, the dimmest planetary nebulae, the deep structure in large faint objects. For that, supplement with a larger reflector. The AT115EDT is not trying to be everything. It's trying to be excellent at what refractors do best.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\"It's difficult for me to consider another refractor that offers this much value. I am completely satisfied with the image quality of this well-built refractor. But most importantly, this refractor compares extremely well to some of the supposedly, more expensive refractors that I have owned and used.\" This owner's video review of the AT115EDT has been followed by 111 replies and widespread agreement from the Cloudy Nights community. — \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/768782-astro-tech-at115edt-review-the-telescope-that-punches-way-above-its-price-range\/?do=findComment\u0026amp;comment=11065796\"\u003eCloudy Nights AT115EDT review thread\u003c\/a\u003e. This owner has experience with multiple refractors at higher price points.\u003c\/p\u003e\n\u003cp\u003e\"I am an AT loyalist because of the fine refractors I have always gotten from them. Every review I have seen of the AT115 is very positive.\" This owner chose the AT115EDT over an Askar 120 APO — not just for the price, but because of long-term trust in the Astro-Tech line. — \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/941765-pulled-the-trigger-on-an-at115edt\/?do=findComment\u0026amp;comment=13757331\"\u003eCloudy Nights AT115EDT discussion\u003c\/a\u003e. This owner is a returning Astro-Tech customer.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eThe AT115EDT's 15.25 pounds puts it right on the edge of what many mid-weight mounts can handle well. An HEQ5\/EQ5-class mount will carry it for visual observing, but for imaging — especially with a camera, guidescope, and accessories — you'll want an EQ6 or Losmandy G11 class mount for stability. Match the mount to the job: if you're visual-only, the lighter mount saves setup time and backache. If you're imaging, don't compromise on mount capacity. The scope deserves a steady platform.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does this compare to a 102mm ED refractor?\u003c\/strong\u003e\u003cbr\u003eThe AT115EDT gathers over 27% more light than a 102mm — that's a meaningful jump. You'll see fainter stars, resolve tighter doubles, and collect more signal in less time when imaging. At f\/7, the AT115EDT is also faster than most 102mm f\/7.8 or f\/8 doublets, which means shorter exposures for astrophotography. The dual-speed 3.2\" focuser, compression rings, and camera angle adjuster are features that many 102mm scopes at the same price don't include.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the FK-61 glass as good as FPL-53?\u003c\/strong\u003e\u003cbr\u003eDifferent, not lesser — for most uses. FK-61 (FPL-51 equivalent) in a triplet design provides excellent chromatic correction. You might see a faint violet halo on bright stars at high power that an FPL-53 or FCD-100 scope would eliminate. In imaging, it's a non-issue with narrowband or modern broadband filters. In visual use, most owners don't notice it under normal conditions. If absolute chromatic perfection is your priority, look at the AT150EDL (FCD-100 glass) or the AT72EDII (FPL-53 glass, smaller aperture). For the vast majority of observers, the FK-61 triplet gives you more aperture for your money — and more aperture means more resolution, more light, and more capability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003eFor visual observing: an HEQ5-class equatorial mount or a solid alt-az mount handles the AT115EDT well. Total payload with diagonal and eyepiece is around 17 pounds. For astrophotography: step up to an EQ6 or Losmandy G11 class mount to get the stability you need for guided long exposures. The Losmandy dovetail is included, so you're ready for Losmandy-compatible saddles out of the box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat do I need for astrophotography with this scope?\u003c\/strong\u003e\u003cbr\u003eAt minimum: the scope, a sturdy equatorial mount with tracking, a camera (DSLR\/mirrorless or dedicated astronomy camera), and a field flattener or reducer\/flattener. The AT115EDT's 0.8x reducer\/flattener takes you to f\/5.6 and 644mm — faster and wider for deep-sky imaging. The 1x flattener keeps you at f\/7 and 805mm with flat stars to the corners. Dedicated CMOS and CCD astronomy cameras connect directly via 48mm T-threads; DSLR and mirrorless cameras need a T-ring for your specific mount (sold separately).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this OTA only? What else do I need?\u003c\/strong\u003e\u003cbr\u003eYes — no mount, eyepieces, diagonal, or finder are included. Plan on a 2\" star diagonal, a set of eyepieces (a 25mm for wide field, a 10mm for medium power, and a 4–5mm for planetary is a good starting trio), and a finderscope or red dot sight. If you're new to refractors, budget for the complete system. A telescope like the AT115EDT deserves quality accessories to match its optics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with a case?\u003c\/strong\u003e\u003cbr\u003eYes — a soft-sided heavy-duty nylon carry case with paper pockets in the lid and foam cutouts for 7 accessories. The scope travels in one bag.\u003c\/p\u003e\n\u003ch3\u003eOptional Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 2\" 99% Reflectivity Dielectric Mirror Diagonal\u003c\/strong\u003e — The companion diagonal for this scope. Dielectric coatings reflect more light than standard aluminum, and 2\" barrels handle the wider fields of view the AT115EDT can deliver.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 0.8x Reducer\/Field Flattener for AT115EDT (Version II)\u003c\/strong\u003e — Drops the focal ratio to f\/5.6 and focal length to 644mm for faster, wider-field imaging with flat stars to the corners. Designed specifically for this scope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 1x Field Flattener for AT115EDT\u003c\/strong\u003e — Full focal length, flat-field imaging at f\/7 and 805mm. For when you want the full reach of the telescope with corrected star shapes across the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech V3 0.8x Reducer\/Field Flattener for AT115EDT with 3.2\" Focuser\u003c\/strong\u003e — The latest version, optimized for the 3.2\" focuser.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech V3 1x Field Flattener for AT115EDT with 3.2\" Focuser\u003c\/strong\u003e — Full focal length flat field, V3 version for the 3.2\" focuser.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT115EDT is the refractor that Cloudy Nights members call \"the telescope that punches way above its price range\" — and after 56 reviews averaging 4.9 stars and an 846-reply owners thread that's still active four years in, the consensus is hard to argue with. It's 115mm of triplet APO with a focuser that holds a brick, optics that compare favorably to scopes at significantly higher prices, and a package of features — compression rings, camera angle adjuster, Losmandy dovetail, carry case — that most competitors charge extra for or skip entirely. It won't replace a 10-inch Dob for hunting the faintest deep-sky objects. It will show you planets, the Moon, double stars, and bright deep-sky with a clarity and contrast that no reflector at any price can match. If you've always wanted to know what the refractor fuss is about, this is where you find out.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e115mm (4.53\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e805mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eED triplet apochromatic (FK-61 center element)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCoatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully multicoated on all air-to-glass surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e230x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.01 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eVisual Limiting Magnitude\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e12.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eDual-speed 3.2\" rack-and-pinion, 10:1 fine focus, 95mm travel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser Rotation\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e360° rotatable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCamera Angle Adjuster\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eBuilt-in (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEyepiece Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2\" and 1.25\" with compression rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e114mm OD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e27.25\" (32.4\" with dew shield extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e15.25 lbs (OTA, rings, handle, Losmandy dovetail)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDovetail\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eLosmandy style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Rings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eDual split hinged CNC, white felt lined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFinder Shoes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eTwo Vixen-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCarry Case\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSoft-sided heavy-duty nylon with foam accessory cutouts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481978351689,"sku":"AT115EDT","price":1199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT115EDT_1-9463.jpg?v=1731697778"},{"product_id":"astro-tech-at130-edt-f-7-ed-triplet-ota","title":"Astro-Tech AT130 EDT f\/7 ED Triplet OTA","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eFive inches of ED triplet aperture is where a refractor stops feeling small. The AT130EDT combines a 130mm f\/7 triplet objective, a heavy-duty 3.2-inch rack-and-pinion focuser, and a mechanical package built for serious visual observing and astrophotography. It's large enough to resolve fine planetary detail, gather meaningful light from distant galaxies, and support full imaging trains without compromise.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe AT130EDT has earned its reputation through years of use by visual observers and astrophotographers alike. The optical design, focuser, and mechanical package work together as a complete system, making it one of the most versatile refractors Astro-Tech has ever offered.\u003c\/p\u003e\n\u003ch3\u003eThe Optical Design\u003c\/h3\u003e\n\u003cp\u003eThe AT130EDT is a three-element FK-61 ED triplet. The front objective is an apochromatic triplet with one ED (Extra Dispersed) element for color correction. All surfaces carry fully multicoated antireflection coatings, optimized for the specific glass types. The interior has multiple knife-edge baffles plus micro baffles in the drawtube, and the lens edges are blackened to control stray light. \u003cmeta charset=\"utf-8\"\u003eFK-61 is generally considered comparable in performance to Ohara FPL-51 when used in similar optical designs.\u003c\/p\u003e\n\u003cp\u003eThe mechanical assembly inside the tube is tight. FK-61 expansion from ambient temperature change is controlled by a precision cell that maintains optical alignment. The objective is sealed — dust, moisture, and temperature swings don't degrade performance over time. In the field, a 130mm triplet needs cool-down time like any refractor, but the thermal mass is manageable — expect 30 to 45 minutes before optics stabilize on a cool night. \u003cmeta charset=\"utf-8\"\u003eLike most 130mm triplets, the AT130EDT benefits from 30–45 minutes of thermal stabilization when moving from a warm environment into significantly cooler night air. The scope rewards both.\u003c\/p\u003e\n\u003ch3\u003eThe 3.2\" Rack-and-Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eThe AT130EDT focuser is a 3.2-inch (81mm) dual-speed rack-and-pinion mechanism with a concentric 10:1 fine-focus knob — the coarse knob and the fine knob are concentric on the same axis, so you can move between coarse and fine without moving your hand. Travel is smooth and repeatable across the full 85mm range. The drawtube itself is marked in millimeter increments for recording focus positions and for matching backfocus on cameras.\u003c\/p\u003e\n\u003cp\u003eThe focuser's 3.2-inch drawtube accepts a large variety of connection systems and handles heavy imaging loads without flexure or image shift. The current production focuser terminates in M92 threads, which connect directly to the AT130EDTRFv3 reducer\/flattener or to a T-ring for standard DSLR\/mirrorless camera work. Older AT130EDT models (pre-2023) used a 2.5-inch focuser with M63 threads — if you're matching a reducer to an older scope, you need the ATREDT30V2, not the newer v3. The two are not interchangeable.\u003c\/p\u003e\n\u003cp\u003eBuilt into the focuser is a camera angle adjuster — a rotating collar that lets you frame your target in landscape, portrait, or any angle between without disassembling the imaging train. A large locking knob keeps rotation steady. This is the feature that saves imaging sessions on nights when framing matters or when you're working in tight spaces with multiple cameras on a multi-scope setup.\u003c\/p\u003e\n\u003ch3\u003eBuilt for the Field\u003c\/h3\u003e\n\u003cp\u003eThe AT130EDT weighs 18.5 pounds with the optical tube and its internal cell, plus mounting rings. With dovetail and carry handle, you're moving about 22 pounds — heavy enough to be a serious optical system, light enough that a single person carries it without strain from car to telescope pad. The scope is 27.5 inches long retracted, and 31 inches with the dew shield extended. \u003c\/p\u003e\n\u003cp\u003eThe mounting system is built to match. Hinged split tube rings with felt linings let you remove and reposition the scope without tools — a practical advantage for equipment swaps or for repositioning the tube during a long session to reach targets at difficult azimuths. The Losmandy-style dovetail plate is rigid and well-indexed, and it's compatible with most saddle plates in that size class. The carry handle has multiple functions: you lift the scope with it, you store accessories and eyepieces in it, and you can mount a guide scope or off-axis guider to it.\u003c\/p\u003e\n\u003cp\u003eThe retractable dew shield extends 4 inches from the objective cell and stores flush against the tube when retracted. In humid conditions, it's a genuine advantage — dew control is easier, and the shield also reduces stray light from overhead sources. For transport, it stows into less than 2 inches of additional length.\u003c\/p\u003e\n\u003cp\u003eThe included nylon carrying case is a first-class protection layer for the optics tube. It's designed with padding on the interior, latches that hold firm, and handles for single-person carry. From backyard to dark sky site, this case has earned its place in the box.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech AT130EDT 130mm f\/7 FK-61 ED triplet refractor OTA\u003c\/li\u003e\n\u003cli\u003eHinged split tube rings (felt-lined) with Losmandy-style dovetail plate\u003c\/li\u003e\n\u003cli\u003eCarry handle with mounting points for accessories\u003c\/li\u003e\n\u003cli\u003e2\" accessory holder with non-marring brass compression ring\u003c\/li\u003e\n\u003cli\u003e1.25\" accessory adapter with non-marring brass compression ring\u003c\/li\u003e\n\u003cli\u003eRetractable self-storing dew shield\u003c\/li\u003e\n\u003cli\u003eNylon carrying case\u003c\/li\u003e\n\u003cli\u003eSlip-on metal dust cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e130mm f\/7 FK-61 ED triplet with three-element design.\u003c\/strong\u003e Apochromatic triplet correction brings all three primary colors to the focal plane, eliminating false color. FK-61 is a Schott glass equivalent to FPL-51 — not FPL-53, but proven excellent in triplet configurations. All surfaces fully multicoated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e910mm focal length — long enough for planetary and galaxy detail, wide enough for moderate deep-sky framing.\u003c\/strong\u003e At 910mm on a full-frame or APS-C sensor, you frame the Orion Nebula complex or a single large galaxy in landscape orientation. Add the dedicated reducer and open to roughly 1.8× wider field at f\/5.6.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.2\" dual-speed rack-and-pinion focuser with 10:1 fine focus and camera angle adjuster.\u003c\/strong\u003e The largest focuser in the EDT line handles heavy imaging trains without flexure. Drawtube rotation lets you frame targets in any orientation. M92 threads (current production) connect directly to the reducer\/flattener or T-ring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple knife-edge baffles plus micro baffles in the drawtube for stray-light suppression.\u003c\/strong\u003e Dark tube interior, blackened lens edges, and rigorous internal design deliver high-contrast views on planets and nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHinged split tube rings with Losmandy-style dovetail and carry handle.\u003c\/strong\u003e Mount or unmount the scope without tools. Rigid enough for serious imaging work. Practical enough for backyards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable dew shield with self-storing design.\u003c\/strong\u003e Extends 4 inches for dew protection and stray-light control in humid conditions. Retracts to minimal footprint for transport.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNylon carrying case included.\u003c\/strong\u003e Padded protection for transport and storage. Single-person carry from the equipment shed to the dark sky site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhite tube with Aston Martin Grey focuser and trim.\u003c\/strong\u003e Clean, professional finish that photographs well and reduces glint when imaging in twilight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with dedicated reducer\/flattener options.\u003c\/strong\u003e Pair with the AT130EDTRFv3 (M92 threads, current) or ATREDT30V2 (M63 threads, older models) to drop from 910mm f\/7 to 728mm f\/5.6. Also available: AT130EDTFFv3 1× field flattener for flatness optimization in full-frame imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003e130mm of aperture in a well-corrected triplet is a working aperture — big enough to see fine detail, small enough to go places. The Dawes diffraction limit is 0.89 arc seconds. The visual limiting magnitude is 13.2. In good conditions at a reasonably dark site, you're finding galaxies that challenge smaller scopes and planets that reward high magnification.\u003c\/p\u003e\n\u003cp\u003eOn the Moon, the AT130EDT shows terraced crater walls, central peaks, and fine rille structure across the entire disc. The terminator reveals texture — Copernicus at 150× shows its terraced ramparts clearly, the Straight Wall is a clean shadow line, and Aristarchus glows like a torch. The lack of false color means the Moon stays crisp and bright-looking even at high power. A 4mm eyepiece at 228× on the Moon is a memorable session — planetary detail you don't forget.\u003c\/p\u003e\n\u003cp\u003ePlanets respond well to 130mm of aperture in this focal ratio. Mars shows polar caps, surface markings, and subtle cloud structure when the opposition position is favorable. Jupiter's Great Red Spot is prominent, and the Cassini Division on Saturn is visible at moderate power under decent seeing. \u003cmeta charset=\"utf-8\"\u003eVenus displays clean crescent phases with excellent color correction. The triplet design keeps the disc contrast high — no magenta or cyan haloes diluting the view.\u003c\/p\u003e\n\u003cp\u003eDouble stars separate cleanly. At 0.89 arc seconds, the AT130EDT splits tight optical pairs that smaller scopes need dark adaptation or averted vision to resolve. Castor resolves at moderate power (5.6 arc seconds). Epsilon Lyrae separates at 150×. Rigel shows its 7th-magnitude companion 9.4 arc seconds away — a test of true contrast, not just resolution. Albireo at low power is a striking color-contrast pair with no false color to mar the view.\u003c\/p\u003e\n\u003cp\u003eDeep sky through a triplet refractor is a different experience than through a reflector or a doublet. The flat field and the high contrast from the triplet design mean you see nebulae with good definition and clusters with sharp stars to the edge of the field. M42 (Orion Nebula) shows fine internal structure — not just the main nebular cloud, but the Running Man nebulosity and the background emission. The Rosette Nebula appears as a full ring structure at low power on dark nights. M31 (Andromeda) spans an impressive width, with dust lane detail visible in good conditions. Messier open clusters — M13, M35, M36, M37, M38 — pop with detail. The lack of a central obstruction means stars appear as clean points rather than diffraction-ring-crossed discs.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\"The AT130EDT has been my workhorse for two years. Serious planetary detail, excellent for galaxies, and the build quality feels like it will outlast me.\"\u003c\/strong\u003e\u003cbr\u003eThis owner paired the scope with a ZWO AM5 mount and has logged over 150 hours split between visual observing sessions and astrophotography nights on deep-sky targets. The user flagged the 3.2-inch focuser as a deciding factor for handling heavy camera and filter-wheel combinations without flex.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\"For the price, this is the scope that keeps winning. I've compared it to much more expensive triplets and the optics hold their ground. Cool-down takes time, but you plan for it and forget about it.\"\u003c\/strong\u003e\u003cbr\u003eThis owner uses the AT130EDT for both planetary imaging and visual observation, and notes that the triplet color correction on high-magnification planetary work is cleaner than what they'd expected at the price point. The user specifically praised the mechanical rigidity under heavier imaging loads.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eWhile the AT130EDT is fully capable of high-magnification planetary observing, many owners discover its greatest strength is versatility. Spend the early part of an evening exploring large nebulae and open clusters at lower power, then move to planets, double stars, and globular clusters as the telescope reaches thermal equilibrium. A 130mm triplet rewards observers who use the full range of what the aperture can offer.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the AT130EDT compare to the AT125EDL doublet?\u003c\/strong\u003e\u003cbr\u003eDifferent design philosophies at similar apertures and focal length. The AT130EDT is a 130mm f\/7 FK-61 triplet with a 3.2-inch focuser and Losmandy dovetail. The AT125EDL is a 125mm f\/7.8 FCD-100 (premium glass) doublet with a 2.5-inch focuser and Vixen dovetail. The triplet design has one advantage in color correction — all three primary colors are brought into coincidence at the focal plane, which shows as crisper contrast on planets. The doublet at FCD-100 quality has a smaller thermal mass and cools faster (25-30 minutes vs. 35-45 minutes for the triplet). The triplet has more aperture and a larger focuser for heavier imaging trains. The doublet has more premium glass and fits lighter mounts. Both are excellent scopes. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich reducer or flattener do I need?\u003c\/strong\u003e\u003cbr\u003eIt depends on your focuser version. If your AT130EDT has the 3.2-inch focuser with M92 threads (current production, 2023 onward), you need the AT130EDTRFv3 reducer\/flattener. If you have an older AT130EDT with the 2.5-inch focuser and M63 threads, you need the ATREDT30V2. They have different thread sizes and are not interchangeable. Check your focuser drawtube carefully — the thread size is marked. The field flattener option is the AT130EDTFFv3 (1×), which is a flattening optic only, not a focal-length changer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount does this scope need?\u003c\/strong\u003e\u003cbr\u003eThe AT130EDT at roughly 22 pounds (with rings and dovetail) needs a mount rated for at least 35 pounds of payload for astrophotography — you need headroom above the tube weight to handle cameras, off-axis guiders, filter wheels, and dew heaters without the mount straining. For visual use, an equatorial mount rated for 30+ pounds works well. The Losmandy dovetail suggests compatibility with heavy-duty mounts — a ZWO AM5, an iOptron CEM60, a Skywatcher HEQ6, or an older Losmandy mount in that weight class. A lighter mount will work for visual observation but will flex noticeably under a heavy imaging camera. Plan on a mount that is overkill for the visual package — you'll thank yourself when you load cameras.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this good for astrophotography?\u003c\/strong\u003e\u003cbr\u003eThe AT130EDT is one of the most popular imaging refractors in the Astro-Tech line — it shows up regularly in astrophotography forums and imaging equipment discussions because it delivers. The 3.2-inch focuser handles heavy camera systems without flexure. The rotatable drawtube and camera angle adjuster simplify field rotation and framing. At 910mm f\/7 on a full-frame or APS-C sensor, you frame larger nebulae and galaxies well. With a reducer, you drop to 728mm f\/5.6 for faster exposures and a wider field. The triplet design is favorable for imaging — color correction is flat across the field, which means less post-processing correction needed. Pair it with a quality mount, a guide scope, and a good camera, and you have a capable imaging platform.\u003c\/p\u003e\n\u003ch3\u003eOptional Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAT130EDTRFv3 0.8× Reducer\/Flattener (M92 threads):\u003c\/strong\u003e Converts the AT130EDT from 910mm f\/7 to 728mm f\/5.6 with a corrected flat field. For current-production scopes with the 3.2-inch focuser. If you have an older AT130EDT with the 2.5-inch focuser, you need the ATREDT30V2 instead — they are not interchangeable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAT130EDTFFv3 1× Field Flattener:\u003c\/strong\u003e Maintains the native 910mm focal length while correcting field curvature for flat, sharp stars to the edges of your sensor. The right choice when you want the full image scale without reducing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 2\" 99% Reflectivity Dielectric Mirror Diagonal:\u003c\/strong\u003e A quality diagonal matters at this level. Dielectric coating delivers near-total reflectivity — you won't lose light to the diagonal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 13mm 100° Field Waterproof Eyepiece:\u003c\/strong\u003e At 910mm focal length, the 13mm delivers 70× with a 100° apparent field — a superb deep-sky eyepiece that frames the larger nebulae and clusters with walk-through-space immersion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe AT130EDT occupies one of the most desirable positions in the refractor world: enough aperture to be genuinely powerful, enough portability to travel easily, and enough mechanical capability to support serious astrophotography. That's why it continues to earn a loyal following among observers and imagers alike.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; height: 1107.09px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003eAstro-Tech AT130EDT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eED Triplet (3-element), fully multicoated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e130mm (5.1\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e910mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eGlass Type\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eFK-61 (Schott FPL-51 equivalent) — NOT FPL-53\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eCoatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eFully multicoated on all air-to-glass surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 58.7812px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 58.7812px;\"\u003eInternal Baffling\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 58.7812px;\"\u003eMultiple knife-edge baffles, micro baffles in drawtube, blackened lens edges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eDawes Diffraction Limit\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e0.89 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eVisual Limiting Magnitude\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e13.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003e3.2\" (81mm) dual-speed rack-and-pinion, 10:1 fine focus ratio\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eFocuser Threads (Current)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eM92 (drawtube), connects to AT130EDTRFv3 reducer or T-ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 58.7812px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 58.7812px;\"\u003eFocuser Threads (Older)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 58.7812px;\"\u003eM63 (pre-2023 models), connects to ATREDT30V2 reducer. NOT interchangeable with M92 models.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eCamera Angle Adjuster\u003c\/td\u003e\n\u003ctd style=\"width: 50%; height: 19.5938px;\"\u003eBuilt-in, 360° rotation with locking knob\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eAccessory Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003e2\" and 1.25\" with non-marring brass compression rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003eRetractable self-storing, extends 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eOTA Length (retracted)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e27.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eOTA Length (dew shield extended)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e31\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e18.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eTotal Weight (with rings, dovetail, handle)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003e22 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eTube Finish\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eWhite anodize with Aston Martin Grey focuser and appointments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eMounting Rings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eHinged split rings (felt-lined) with M6×1 mounting holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eDovetail\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003eLosmandy-style, rigid and well-indexed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eCompatible Reducer (current focuser)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eAT130EDTRFv3 with M92 threads → 728mm f\/5.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 58.7812px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 58.7812px;\"\u003eCompatible Reducer (older focuser)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 58.7812px;\"\u003eATREDT30V2 with M63 threads → 728mm f\/5.6 (NOT interchangeable with v3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 166.594px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 166.594px;\"\u003eField Flattener Option\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 166.594px;\"\u003eAT130EDTFFv3 (1× flattener only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eCool-Down Time (expected)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003e35-45 minutes on a cool night for thermal equilibrium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 39.1875px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 39.1875px;\"\u003eCarry Case\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 39.1875px;\"\u003eNylon with padding and latches, single-person carry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(255, 255, 255); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: rgb(240, 244, 248); height: 19.5938px;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); font-weight: bold; width: 50%; height: 19.5938px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid rgb(204, 204, 204); height: 19.5938px;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481978384457,"sku":"AT130EDT","price":1649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT130EDT_1-9453_df05fdf3-cb5b-4394-88c5-c23fd6d403c6.jpg?v=1739225361"},{"product_id":"astro-tech-at152edt-f-8-triplet-apo-refractor-ota","title":"Astro-Tech AT152EDT f\/8 Triplet APO Refractor OTA","description":"\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cb\u003eThis Product Has Been Discontinued.  This Page Is Here For Informational Purposes Only.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eThe Astro-Tech AT152EDT 152mm f\/8 Triplet Apochromatic Refractor – A True Lifetime Telescope \u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFor those who demand the best in optical performance and value, the Astro-Tech AT152EDT is the perfect solution. This 6\" f\/8 triplet apochromatic refractor is designed for serious observers and astrophotographers who want premium optics, excellent color correction, and the versatility to adapt to different imaging and visual setups. With its FK61 and Lanthanum elements housed in a temperature-compensated, collimatable cell, the AT152EDT delivers stunningly sharp, high-contrast images with virtually no chromatic aberration—making it a truly lifetime instrument for those who appreciate refractor performance at its finest. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003ePremium Triplet APO Optics – Sharp, Color-Free Performance \u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eAt the heart of the AT152EDT is its precision-engineered 152mm triplet objective lens, featuring FK61 as the center element and Lanthanum as the rear element. This combination provides: \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eExceptional color correction\u003c\/b\u003e – Virtually eliminates chromatic aberration for razor-sharp views. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eOutstanding contrast and clarity \u003c\/b\u003e– Fully multi-coated optics maximize light transmission. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003ePrecision-collimated, temperature-compensated cell \u003c\/b\u003e– Ensures peak performance in all conditions. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eWhether you're viewing fine planetary detail, resolving deep-sky objects, or capturing high-resolution astrophotography, the AT152EDT’s premium optics deliver results that rival far more expensive telescopes. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eA Versatile \u0026amp; Robust Focuser for Visual and Imaging Use \u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe AT152EDT is equipped with a high-quality 3.7\" dual-speed rack \u0026amp; pinion focuser that provides precise, rock-solid focusing for both visual observers and astrophotographers. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003e98mm of travel with 4” of removable extension\u003c\/b\u003e – Adjustable back focus (140mm-210mm) to accommodate binoviewers, astro-cameras, and various imaging setups. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eRotatable design \u003c\/b\u003e– Effortless framing and composition for imaging. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eSecure-Lock compression ring \u003c\/b\u003e– Ensures your eyepieces and accessories stay firmly in place. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eMultiple thread options \u003c\/b\u003e– Compatible with a wide range of imaging accessories (M100x1, M92x1, M68x1 female threads). \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eDirect Reducer\/Flattener Compatibility \u003c\/b\u003e– The optional 0.72x reducer\/flattener threads directly onto the focuser for optimized astrophotography performance. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis level of flexibility means the AT152EDT is equally at home on a mount tracking deep-sky objects as it is being used for high-powered lunar and planetary observation. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eThoughtful Design for Maximum Convenience \u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBeyond its exceptional optics and focuser, the AT152EDT is designed with user convenience in mind: \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eRetractable dew shield with locking screw \u003c\/b\u003e– Minimizes stray light and protects against dew buildup. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eCNC-machined tube rings \u003c\/b\u003e– Lightweight yet sturdy, with a Losmandy-style dovetail on one side and a Vixen-style dovetail\/handle on the other for maximum mounting versatility. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003ePre-installed Vixen-style finder scope shoe \u003c\/b\u003e– Easily attach your preferred finder scope or guide scope. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eWeighing just 28 pounds, the AT152EDT is a manageable yet powerful instrument, offering a perfect balance between aperture, performance, and portability. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eA Lifetime Instrument for Serious Observers and Astrophotographers\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe Astro-Tech AT152EDT is not just another refractor—it’s an investment in optical excellence. With its exceptional triplet optics, robust focuser, and adaptable design, this 152mm apochromatic refractor is the ideal telescope for those who demand the best in both visual and astrophotographic performance. Whether you’re planning deep-sky imaging, planetary observation, or simply seeking the crispest, most color-free views possible, the AT152EDT is built to exceed expectations. \u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\" style=\"max-width: 500px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1216mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eHeaviest Single Component\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e28 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e28 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eOptical Coatings\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFully Mutli-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eSupplied Eyepiece\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eTelescope Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eRefractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eView Finder\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eVisual Limiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 25%;\"\u003eBack Focus\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e140mm to 210mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481981726793,"sku":"AT152EDT","price":3499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/at152edt-right-side-straight-dew-shield-retracted-focuser-in-273752.jpg?v=1675379422"},{"product_id":"astro-tech-at60ed-60mm-f-6-fpl-53-ed-doublet","title":"Astro-Tech AT60ED 60mm f\/6 FPL-53ED and Lanthanum Doublet","description":"\u003cp\u003eSky \u0026amp; Telescope called it a Hot Product. Years of owner reviews later, the AT60ED has earned that reputation many times over. This is a 60mm f\/6 ED doublet with FPL-53 and Lanthanum glass — the same premium ED optics that define refractor performance — packed into a scope small enough to fit a backpack. It works as a wide-field visual scope, a capable travel refractor, a guide scope, or a small-chip astrophotography platform. It does all four well, and none of them compromise.\u003c\/p\u003e\n\u003cp\u003eThe key is the glass. FPL-53 is Ohara's premium ED element, paired here with a Lanthanum element to deliver virtually zero chromatic aberration at f\/6. The AT60ED's 360mm focal length is fast — fast enough for efficient wide-field imaging, fast enough to show brighter deep-sky objects in impressive fields of view, fast enough that you can gather a surprising amount of light in short exposures. For a scope you can literally carry in one hand, that's serious capability.\u003c\/p\u003e\n\u003cp\u003eThe focuser is a dual-speed 2-inch Rack and Pinion with 10:1 fine focus and a camera angle adjuster. This is the kind of focuser found on much larger scopes. The CAA lets you rotate your camera or guide camera for framing without moving focus. The scope mounts via a finder ring with a 1\/4\"-20 tapped foot — straight onto a photo tripod, or into a standard finder shoe on a larger scope for piggyback work. The retractable dew shield stores flat against the tube for travel. Light, compact, versatile, and with optics that punch far above the aperture.\u003c\/p\u003e\n\u003ch3\u003eThe Optical Design\u003c\/h3\u003e\n\u003cp\u003eFPL-53 glass is Ohara's premium ED element. Paired with a Lanthanum element, it produces a doublet design that delivers near-zero chromatic aberration at this focal ratio. The surfaces are fully multicoated to maximize light transmission and contrast. What this means in practice: bright, sharp star images with virtually no false color, even at moderate magnifications. The 360mm focal length at f\/6 puts the AT60ED in the sweet spot where refractors excel — fast enough to be practical, slow enough to be forgiving on eyepiece quality.\u003c\/p\u003e\n\u003ch3\u003eThe Focuser\u003c\/h3\u003e\n\u003cp\u003eMost 60mm scopes come with a simple focuser. The AT60ED doesn't. The 2-inch dual-speed Rack and Pinion gives you coarse focus on one knob and 10:1 fine focus on a concentric microknob. For visual work at moderate powers, coarse focus is fine. For astrophotography with a camera that weighs more than an eyepiece, or when you're chasing critical focus on a guide star, the 10:1 ratio becomes essential. One user loaded a 2\" diagonal, a wide-field eyepiece, and a camera onto the drawtube — over 3 pounds — and reported the focuser held position without drift.\u003c\/p\u003e\n\u003cp\u003eThe built-in camera angle adjuster lets you rotate your camera or guide camera for framing without disturbing focus. Loosen the adjuster, rotate to your desired angle, tighten. For astrophotography, this saves you from the usual dance of adjusting focus after rotating the camera. For guide scope work, it means you can position your guide camera to find a suitable guide star without refocusing.\u003c\/p\u003e\n\u003ch3\u003eBuilt for the Field\u003c\/h3\u003e\n\u003cp\u003eThis scope was designed for motion — from the car to the dark site, from the backyard to a high-altitude location, from sitting on a photo tripod to riding piggyback on a larger scope. The finder ring with 1\/4\"-20 tapped foot is the key. Any photo tripod, any finder shoe, any mounting bracket with standard photo threads accepts it. No special adapters, no dovetails that only fit one brand of mount, no compromise with existing gear.\u003c\/p\u003e\n\u003cp\u003eAt about 3.25 pounds, the AT60ED is among the lightest refractors in the Astro-Tech lineup — light enough to carry in one hand, ride piggyback on a larger scope, or sit on a sturdy photo tripod. For travel, for driveway astronomy, for throw-it-in-the-car observing, weight matters. This scope goes everywhere.\u003c\/p\u003e\n\u003cp\u003eThe guide scope role is worth its own mention. At 360mm focal length, the AT60ED provides enough image scale for reliable autoguiding with standard guide cameras. The camera angle adjuster means you can position your guide camera without refocusing. Mount it on a finder shoe above your main imaging rig, and you have a compact, capable guide scope that doesn't consume real estate or add weight to your imaging setup. For small to mid-size refractors, the AT60ED serves double duty: when you upgrade to a larger imaging scope, keep it as your guide scope.\u003c\/p\u003e\n\u003cp\u003eThe 1\/4\"-20 mount also accepts standard photo tripod heads — ball heads, geared heads, whatever you prefer. Attach it to a quality photo tripod and you have a wide-field visual scope that sets up in seconds and fits in the car without contention for space.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech AT60ED 60mm f\/6 FPL-53 + Lanthanum ED doublet refractor OTA\u003c\/li\u003e\n\u003cli\u003eFinder ring with 1\/4\"-20 tapped foot\u003c\/li\u003e\n\u003cli\u003e2\" eyepiece holder with compression ring and camera angle adjuster\u003c\/li\u003e\n\u003cli\u003e1.25\" adapter with compression ring\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield\u003c\/li\u003e\n\u003cli\u003eSlip-on metal dust cap\u003c\/li\u003e\n\u003cli\u003eNylon soft carry case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFPL-53 + Lanthanum doublet optics\u003c\/strong\u003e — Ohara's premium ED glass with Lanthanum element. Near-zero chromatic aberration. Fully multicoated surfaces for maximum contrast and light transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60mm aperture, f\/6, 360mm focal length\u003c\/strong\u003e — Fast enough for efficient wide-field imaging and wide-field visual views. Compact enough to carry in a backpack. Premium optics in the smallest AT ED refractor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-speed 2\" Rack and Pinion focuser\u003c\/strong\u003e — 10:1 fine-focus ratio for precise focus adjustment. Critical for astrophotography and guide scope work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera angle adjuster (CAA)\u003c\/strong\u003e — Rotate your camera or guide camera for framing without disturbing focus. Standard on the AT60ED, optional on many other scopes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression ring accessory holders\u003c\/strong\u003e — 2\" and 1.25\" holders with brass compression rings. No thumbscrews to mar your eyepieces or diagonals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\"-20 photo tripod mount\u003c\/strong\u003e — Accepts any standard photo tripod, any finder shoe, any mounting bracket with standard 1\/4\"-20 threads. No proprietary dovetails.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable dew shield\u003c\/strong\u003e — Protects the objective from ambient light and slows dew formation. Retracts flat for compact storage and travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhite tube finish with black and red trim\u003c\/strong\u003e — Professional appearance, durable enamel finish. Red trim matches other AT components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile — guide scope, wide-field imager, travel visual scope, backup optical tube\u003c\/strong\u003e — Few scopes at any price wear as many hats this well.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eThe Moon through a 60mm f\/6 refractor is a masterclass in what aperture isn't everything. At 60x with a 6mm eyepiece, the Moon fills the field and the terminator comes alive with shadow detail — crater walls catching the first light, rilles threading across mare floors. The bright craters pop against the dark maria with the contrast that only a well-corrected refractor delivers. At 100x on steady nights, you're seeing sharp, high-contrast lunar features. It's not a 10-inch Dob, but what you see is vivid and real.\u003c\/p\u003e\n\u003cp\u003eJupiter and Saturn reward the AT60ED with surprisingly detailed views. \u003cmeta charset=\"utf-8\"\u003eJupiter reveals the two main equatorial belts and the changing positions of its Galilean moons. Saturn shows its ring system clearly separated from the globe, and under steady skies hints of the Cassini Division become visible. The Moon is especially rewarding, with razor-sharp crater walls and excellent contrast along the terminator. You won't achieve planetary mag-140x performance, but the AT60ED at 100-120x delivers planetary views that make you forget you're looking at a 60mm scope.\u003c\/p\u003e\n\u003cp\u003eDouble stars are a refractor speciality, and the AT60ED shows them well. Albireo splits easily even at low power, gold and blue separated cleanly. Epsilon Lyrae — the Double Double — resolves all four components at 100x. The contrast and sharpness are what refractors are actually for, and the AT60ED doesn't disappoint.\u003c\/p\u003e\n\u003cp\u003eWide-field deep-sky is where the AT60ED shines. At f\/6 with 360mm focal length, a 30mm eyepiece delivers a 3-degree field of view — large enough that you're seeing context, seeing neighborhoods of stars, seeing the Milky Way as a structure rather than scattered points. The Pleiades fill the field with their brightness and arrangement. The Double Cluster in Perseus spans the view with a clarity that only a refractor delivers. The Andromeda Galaxy stretches across the field at low power with dark lanes visible on a good night. M31, M33, the Hyades, the Beehive — all look better through a 60mm f\/6 than through higher-magnification instruments. Wide-field observing rewards aperture and focal ratio over magnification, and the AT60ED has both.\u003c\/p\u003e\n\u003cp\u003ePlanets are limited by aperture — you won't resolve detail on Mars or Saturn that a 6-inch scope shows. Faint galaxies are out of reach. The dimmest planetary nebulae are inaccessible. But everything bright, everything colorful, everything that benefits from pure optical excellence and wide fields of view is fair game. Use the AT60ED for what it's built for, and it delivers.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003eThe AT60ED has been discussed and dissected on Cloudy Nights for years, often head-to-head against pricier rivals. The recurring verdict from owners is that the optics punch well above the price.\u003c\/p\u003e\n\u003cblockquote style=\"border-left: 3px solid #2d6a9f; margin: 16px 0; padding: 4px 16px; color: #333;\"\u003e\"Nice focuser, fit\/finish, and performance for the price!... I bought it as a travel AP scope.\"\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/664236-astro-tech-at60ed\/?do=findComment\u0026amp;comment=9422804\"\u003eCloudy Nights AT60ED imaging discussion\u003c\/a\u003e. This owner pairs it with the matching 1× field flattener and camera angle adjuster on a travel mount.\u003c\/blockquote\u003e\n\u003cp\u003eOwners consistently place its optics in the same conversation as refractors costing considerably more — which, for a scope this small and this affordable, is the whole point.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eThe AT60ED excels in wide-field observing, and wide-field observing rewards low power and large exit pupils. A 30mm eyepiece at 12x, a 25mm at 14x, a 20mm at 18x — these are the magnifications where the AT60ED sings. The 360mm focal length and f\/6 ratio were designed for exactly this kind of use. Pair it with a quality 30-35mm eyepiece and you have a device for exploring the Milky Way that rewires how you think about observing. \u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the AT60ED compare to the AT72EDII?\u003c\/strong\u003e\u003cbr\u003eSame glass family (both FPL-53 + Lanthanum), same f\/6 focal ratio, same camera angle adjuster. The AT72EDII has more aperture — 72mm vs. 60mm — which means 44% more light, higher resolution, and slightly more reach at 432mm vs. 360mm focal length. The AT72EDII comes with two tube rings and a Vixen dovetail (heavier, more capable mounting). The AT60ED uses a simple 1\/4\"-20 foot (lighter, more flexible mounting). Choose the AT60ED for maximum portability and versatility; choose the AT72EDII for more aperture in a still-compact package.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between FPL-53 and FK-61 glass?\u003c\/strong\u003e\u003cbr\u003eFPL-53 is Ohara's premium ED element; FK-61 is Schott's FPL-51 equivalent (also excellent, but a different standard). \u003cmeta charset=\"utf-8\"\u003eFPL-53 generally allows tighter color correction than FK-61 when used in similar optical designs. The AT60ED uses FPL-53. The AT70ED uses FK-61 with a simpler focuser and no CAA. Both are good scopes; the AT60ED is the premium version.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this as a guide scope?\u003c\/strong\u003e\u003cbr\u003eYes — it's an ideal guide scope. At 360mm focal length, the AT60ED provides enough image scale for reliable autoguiding with standard guide cameras. The 10:1 fine-focus ratio makes guide star acquisition precise. The camera angle adjuster lets you rotate your guide camera to find a guide star without refocusing. Mount it on a finder shoe above your main imaging rig and it will serve you for years.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this good for astrophotography?\u003c\/strong\u003e\u003cbr\u003eYes, for wide-field deep-sky imaging. At 360mm f\/6, the AT60ED frames large open clusters, nebulae, and galaxies efficiently. Pair it with the ATRF60 0.8× reducer for 288mm at f\/4.8 (faster, wider field). Pair it with the AT60FF 1× field flattener for full focal length imaging at f\/6 with flat stars to the corners. The camera angle adjuster makes framing straightforward. For small-chip or crop-sensor cameras, the AT60ED is a capable wide-field imaging platform.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount or tripod do I need?\u003c\/strong\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003eFor visual observing, the AT60ED works well on a sturdy photographic tripod or lightweight alt-azimuth mount. For astrophotography, a small equatorial mount such as an HEQ5, AM3, or similar class mount provides more than enough capacity.  You will need a Vixen Dovetail to attach the AT60ED to a telescope mount.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else do I need to start observing?\u003c\/strong\u003e\u003cbr\u003eThe scope is OTA only — no mount, eyepieces, diagonal, or finder are included. For visual observing, budget for a 2\" star diagonal, a set of eyepieces (a 30mm for wide-field, a 12-15mm for medium power, and a 6-8mm for higher magnification is a good starting set), and a finderscope or red dot sight. If you're new to refractors, invest in quality accessories. A scope this good deserves eyepieces and a diagonal that match its optics.\u003c\/p\u003e\n\u003ch3\u003eOptional Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech ATRF60 0.8× Reducer\u003c\/strong\u003e — Reduces focal length to 288mm at f\/4.8 for faster, wider-field astrophotography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech AT60FF 1× Field Flattener\u003c\/strong\u003e — Full focal length flat-field imaging at 360mm f\/6. For corrected star shapes across the field at native specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 2\" 99% Reflectivity Dielectric Mirror Diagonal\u003c\/strong\u003e — The companion diagonal. Dielectric coatings reflect more light than standard aluminum, preserving the light the AT60ED gathers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech eyepieces — 30mm UWA, 20mm Paradigm Dual ED, or 9-27mm Zoom\u003c\/strong\u003e — Premium eyepieces that unlock the AT60ED's wide-field potential and deliver the contrast the scope is capable of.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT60ED is the smallest Astro-Tech refractor with FPL-53 glass, and it pulls off something rare: maximum versatility without compromise. Premium optics, a 2-inch focuser with camera angle adjuster, a simple 1\/4\"-20 mount that works with anything, and a form factor so compact you forget you're carrying it. \u003cmeta charset=\"utf-8\"\u003eGuide scope, travel refractor, wide-field imager, or grab-and-go visual telescope — few scopes at any price fill as many roles as effectively as the AT60ED. Years of owner reviews and a Sky \u0026amp; Telescope Hot Product award don't come from hype. They come from a scope that actually delivers what its specs promise, and then some.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e360mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eED doublet (FPL-53 + Lanthanum ED)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCoatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully multicoated on all air-to-glass surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.92 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eVisual Limiting Magnitude\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e11.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e120x (per AT manual)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eDual-speed 2\" Rack and Pinion, 10:1 fine focus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCamera Angle Adjuster\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eBuilt-in (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEyepiece Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2\" and 1.25\" with brass compression rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFinder ring with 1\/4\"-20 tapped foot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eRetractable, self-storing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Finish\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eWhite tube with black and red trim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e3.25 lbs (OTA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAwards\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSky \u0026amp; Telescope Hot Product 2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481982939209,"sku":"AT60ED","price":369.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT60ED_3-10139.jpg?v=1714058831"},{"product_id":"astro-tech-at70ed-2-8-f-6-ed-refractor-ota","title":"Astro-Tech AT70ED 2.8\" f\/6 ED Refractor OTA","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eThis Product Has Been Discontinued.  This Page Is Here For Informational Purposes Only.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe AT70ED delivers genuine ED glass performance at an honest price. Seventy millimeters of aperture at f\/6 yields 420mm of focal length — a sweet spot for wide-field deep-sky observing and planetary detail on the Moon. The FK-61 ED glass controls chromatic aberration well for a doublet, and it's compact enough to toss in a backpack and take anywhere. Twenty-three owner reviews, and growing.\u003c\/p\u003e\n\u003cp\u003eThere's no fluff here. This is an entry-level ED scope, and we're not pretending it's something it isn't. But entry-level doesn't mean compromise. The focuser is a dual-speed 2-inch Rack and Pinion with 10:1 fine focus — the same mechanical foundation used on much larger AT instruments. The single tube ring mounts to a photo tripod via the 1\/4\"-20 foot, or accepts a Vixen dovetail plate for more serious mounting systems. The scope accepts 2\" and 1.25\" eyepieces via brass compression rings.\u003c\/p\u003e\n\u003cp\u003eThe AT70ED is a working scope. You'll observe with it, not just admire it. That's the design.\u003c\/p\u003e\n\u003ch3\u003eThe Optical Design\u003c\/h3\u003e\n\u003cp\u003eFK-61 glass is a Schott product — the optical equivalent of the FPL-51 premium ED glass. At f\/6, FK-61 delivers very low residual chromatic aberration across the visible spectrum. Bright planets show with minimal false color, and wide-field views on the Moon and deep sky are sharp across the entire field. The multi-coated optics maximize light transmission and contrast — no surprises there.\u003c\/p\u003e\n\u003cp\u003eThe f\/6 focal ratio is fast enough to gather decent light for deep-sky observation but slow enough that optical aberrations stay controlled without exotic glass. It's a practical ratio, which is why you see it on scopes from 50mm to 150mm across the industry. At 70mm and f\/6, you've got 420mm of focal length to work with — enough reach for lunar and planetary detail, but still wide enough that you can frame large objects like the Orion Nebula or the Pleiades in their entirety with a 25mm eyepiece (16.8× magnification, 2.5-degree field).\u003c\/p\u003e\n\u003cp\u003eThe coating is standard multi-coated treatment on all air-glass surfaces. It's not fancy, but it's effective. What you see is what you get: a clean, bright image without the optical quirks you'd encounter in uncoated or partially coated designs.\u003c\/p\u003e\n\u003ch3\u003eThe Focuser\u003c\/h3\u003e\n\u003cp\u003eThe focuser is a 2-inch dual-speed Rack and Pinion mechanism with 10:1 fine-focus ratio. You get both coarse and fine knobs — the coarse knob for rough focusing, the fine knob when you're dialing in critical focus or tracking an object. Ten-to-one fine focus is smooth enough for planetary observation and precise enough for visual photometry or simple lunar imaging. No camera angle adjuster (CAA) on this model — it's a simple, direct focuser without the mechanical complexity. If rotation matters to you, step up to the AT72EDII or AT80ED.\u003c\/p\u003e\n\u003cp\u003eThe focuser accepts 2\" and 1.25\" eyepieces (or imaging cameras) via brass compression rings. The rings have a slight concave surface that centers the barrel without scratching — standard design, proven over decades. This is reliable, no-fuss interface.\u003c\/p\u003e\n\u003ch3\u003eBuilt for the Field\u003c\/h3\u003e\n\u003cp\u003eThe AT70ED weighs about 4 pounds without accessories — light enough to carry one-handed but substantial enough that mechanics feel solid. The single mounting ring comes with a foot featuring a 1\/4\"-20 thread hole. That hole accepts a standard camera tripod head, or a Vixen dovetail plate if you want to mount it on an equatorial or altazimuth head. It's the minimal-complexity approach to mounting: you pay for what you use, and the 1\/4\"-20 hole is enough for most setups.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech AT70ED 70mm f\/6 FK-61 ED refractor OTA\u003c\/li\u003e\n\u003cli\u003eSingle mounting ring with foot and 1\/4\"-20 thread hole\u003c\/li\u003e\n\u003cli\u003e2\" and 1.25\" brass compression ring eyepiece holders\u003c\/li\u003e\n\u003cli\u003eLens cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e70mm f\/6 FK-61 ED doublet\u003c\/strong\u003e — Fully multi-coated. Clean color correction on bright targets and wide-field deep sky.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e420mm focal length\u003c\/strong\u003e — Fast enough for light gathering, slow enough that color correction stays simple.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-speed 2\" Rack and Pinion focuser\u003c\/strong\u003e — 10:1 fine focus ratio. Smooth, reliable, no complexity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4\"-20 tripod mount with single tube ring\u003c\/strong\u003e — Works on any photo tripod. Accepts Vixen dovetail plates for equatorial or altaz mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass compression ring holders\u003c\/strong\u003e — Secure, reliable interface for 2\" and 1.25\" eyepieces and small cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and portable\u003c\/strong\u003e — 4 pounds, fit-in-a-backpack size. Grab-and-go observing without sacrifice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFK-61 glass\u003c\/strong\u003e — Optical equivalent of premium FPL-51 ED glass. Proven performance on bright targets and deep sky.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest value\u003c\/strong\u003e — Entry-level ED without the entry-level prices you'd find in uncoated or partially-coated scopes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eAt 70mm, you're observing at the threshold where aperture starts to matter. The Moon is sharp and detailed — craters, scarps, rilles all stand out in reasonable magnifications (60× to 120× is the sweet spot for lunar work). You can get decent lunar imaging with a small camera and a 2× Barlow if you're careful with atmospheric seeing.\u003c\/p\u003e\n\u003cp\u003ePlanetary observing with the AT70ED is real but has limits. Jupiter shows cloud detail and the Great Red Spot under steady seeing. Saturn's rings are clearly separated from the ball, and you can glimpse cloud structure in the atmosphere. Mars, when it's favorably placed, shows polar caps and albedo features — not the level of detail you'd get with 130mm, but honest Mars. Venus shows phases, which is always worth a look. These are not casual glances. These are objects worth spending time on.\u003c\/p\u003e\n\u003cp\u003eDouble stars are the AT70ED's playground. At 70mm and f\/6, you have enough aperture to resolve pairs down to about 1.5 arcseconds under decent seeing. The Trapezium in Orion separates into distinct stars. Binary star observing is satisfying on this scope — there are thousands of interesting pairs in the sky, and the AT70ED resolves enough of them to keep you busy for years.\u003c\/p\u003e\n\u003cp\u003eWide-field deep sky is where the AT70ED shines. At 420mm and a reasonable 25mm eyepiece (16.8×, 2.5-degree field), you frame the entire Orion Nebula with room to spare. The Pleiades looks exactly like it should — a cluster of stars in a nice-sized field, not a compressed blob. Messier objects like M13 (Hercules Cluster), M31 (Andromeda), M42 (Orion Nebula), and M57 (Ring Nebula) all look their best in a scope of this size — enough magnification to resolve structure, wide enough field that you're not staring at a postage stamp.\u003c\/p\u003e\n\u003cp\u003eLight pollution limits any scope, but 70mm handles moderately light-polluted skies well. You won't do deep-sky work under urban lights, but from a backyard 30 minutes outside the city, or a dark site, the AT70ED will show you why you got into this hobby.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\"This is a solid little scope for the money. Sharp optics, good focuser, and light enough to take anywhere. I use it on a photo tripod for quick looks and on an equatorial head for imaging. Does both well.\" \u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eThe AT70ED benefits from a proper finder scope or red-dot finder. At 70mm and 420mm focal length, your field of view at typical magnifications is manageable but not huge. A red-dot finder like the ATF850SI or a small crosshair finder will save you time hunting for objects. Centering an object in the field first with a finder, then acquiring it in your eyepiece, is faster and more satisfying than star-hopping blind. If you're starting from scratch, budget for a finder scope in addition to your eyepieces.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the AT70ED compare to the AT72EDII?\u003c\/strong\u003e\u003cbr\u003eGlass, focuser, and mounting differ. The AT72EDII uses FPL-53 glass (premium) with a camera angle adjuster on the focuser and a Vixen dovetail with two tube rings. The AT70ED uses FK-61 glass (entry-level ED), a simple dual-speed focuser without CAA, and a single mounting ring with a 1\/4\"-20 foot. The AT72EDII is more capable as an imaging platform and has better color correction. The AT70ED is lighter, more portable, and cheaper. Both are good scopes. The AT72EDII is the premium version.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the AT70ED for astrophotography?\u003c\/strong\u003e\u003cbr\u003eYes, but with caveats. The 1\/4\"-20 mounting is fine for small mirrorless cameras or planetary cameras on a solid tripod head. At 420mm f\/6, the AT70ED is a wide-field imager. Pair it with a small chip camera for deep-sky work — galaxies, nebulae, open clusters all fit nicely at native focal length. There's no dedicated reducer or flattener for this model, so you're working at native focal length and focal ratio. This is straightforward wide-field imaging work, not planetary or planetary nebula work.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount does the AT70ED need?\u003c\/strong\u003e\u003cbr\u003eFor visual use, any decent photo tripod with a standard ball head will work — nothing fancy required. For short imaging sessions, a tripod works too. For tracking-based astrophotography (say, a 30-second planetary video or a 5-minute deep-sky image), you need an equatorial mount capable of precise tracking. At 4 pounds, the scope fits on most mid-range equatorial mounts. A Vixen dovetail plate ($20–40) lets you mount the scope on any head with a Vixen-style saddle. No exotic mount required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mount this on a camera tripod?\u003c\/strong\u003e\u003cbr\u003eYes — directly. The 1\/4\"-20 foot threads into any standard photo tripod head. The scope is light enough that a decent ball head or pan-tilt head handles it without strain. For visual use, this is a fine setup. For long-duration imaging, an equatorial mount or alt-azimuth head with tracking capability is better, but a tripod works for quick looks or short camera exposures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat do I need to start observing with the AT70ED?\u003c\/strong\u003e\u003cbr\u003eThe scope itself, a tripod (or mount head), eyepieces, and a diagonal. The AT70ED accepts standard 2\" and 1.25\" diagonals and eyepieces. Start with one good eyepiece — a 25mm gives you 16.8× and a nice wide field for deep sky. Add a 9mm or 10mm for 46× to 47× for brighter planetary and lunar work. A 2× Barlow doubles your magnification options. A finder scope or red-dot finder makes acquisition much easier. These are all available separately — nothing locked into Astro-Tech proprietary designs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the AT70ED good as a travel scope?\u003c\/strong\u003e\u003cbr\u003eAbsolutely. Four pounds, 18 inches long if you include the mounting ring, and simple mechanics make it ideal for travel. The 1\/4\"-20 foot threads into any tripod head you can fit in a travel bag. A small ball head, a couple of eyepieces, and a diagonal fit easily in a carry-on. The scope will survive transport, cool down fast at a new observing site, and perform the same way it does at home. This is a genuine grab-and-go scope.\u003c\/p\u003e\n\u003ch3\u003eOptional Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVixen Dovetail Plate (ATVUP9)\u003c\/strong\u003e — Mounts the AT70ED on equatorial or altaz heads. Recommended if you move beyond photo tripod use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder Scope (ATF850SI 8×50)\u003c\/strong\u003e — Makes object acquisition faster and more reliable. Improves the observing experience significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2× Telecentric Barlow (AT2XTB)\u003c\/strong\u003e — Doubles your eyepiece magnification options. Useful for lunar and planetary work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Eyepieces\u003c\/strong\u003e — Start with a 25mm wide-field eyepiece for deep sky (16.8×), then add a 9mm or 10mm for higher magnification (46–47×). AT or third-party eyepieces both work.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT70ED is an entry-level ED refractor that doesn't pretend to be something it isn't. It has FK-61 glass, not FPL-53 or FCD-100. It has a simple focuser without a camera angle adjuster. It mounts on a photo tripod with a 1\/4\"-20 foot. These are practical choices that keep the price low without sacrificing optics or mechanics. You get genuine ED performance in a package you can carry, afford, and actually use without overthinking it. Wide-field deep sky, lunar detail, planetary observing, double stars — the AT70ED does all of these well enough to spend real time with the scope. That's what matters.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e70mm (2.75\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e420mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eED doublet (FK-61 glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCoatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eDual-speed 2\" Rack and Pinion, 10:1 fine focus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAccessory Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2\" and 1.25\" brass compression ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSingle tube ring with foot, 1\/4\"-20 thread hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e76mm (3\") outer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eApproximately 4 lbs (tube only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eRetractable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eIncluded Accessories\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSingle tube ring with foot, 2\" and 1.25\" compression ring holders, lens cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481990737993,"sku":"AT70ED","price":279.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT70ED_1-10125.jpg?v=1714751883"},{"product_id":"astro-tech-at125edl-refractor-ota-fcd-100-and-lanthanum-f-7-8-doublet","title":"Astro-Tech AT125EDL Refractor OTA FCD-100 and Lanthanum f\/7.8 Doublet","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eThis Product Has Been Discontinued.  This Page Is Here For Informational Purposes Only.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe AT125EDL occupies a rare middle ground: it's large enough to gather meaningful light and resolution, yet nimble enough that you can pick it up, pack it, and take it anywhere. A 125mm f\/7.8 refractor at this price point used to mean one of two choices: pay for a decent triplet and spend five years paying it off, or accept a doublet with enough purple fringing to make you squint at bright stars. The AT125EDL is neither trap. It's an air-spaced doublet using Ohara FCD-100 extra-low dispersion glass paired with a lanthanum crown element — the same optical formula that drives our flagship AT150EDL, scaled intelligently for a five-inch aperture. The result is a scope that corrects color to within whiskers of a triple-element apochromat, delivers images that snap into focus with textbook diffraction patterns, and weighs just enough that one person can reasonably set it up solo.\u003c\/p\u003e\n\u003cp\u003eBuild a 125mm refractor and you're thinking about the sweet spot where aperture starts mattering in a serious way. Five inches collects two and a half times more light than an 80mm, fifty percent more than a 102mm, and the light grasp alone is worth the money if deep-sky is your thing. But in a refractor, aperture means something else too: it means resolution without compromise. An unobstructed 125mm objective delivers clean, contrasty Airy disks with no central obstruction to scatter light and soften detail. Pair that with the right glass — FCD-100 from Ohara, the same material used in high-end camera lenses and observatory instruments — and you get a scope that does planetary, lunar, and deep-sky work without apology. The optical guarantee is minimum 0.95 Strehl. In practice, these scopes ship closer to 0.97 and higher.\u003c\/p\u003e\n\u003cp\u003eThe AT125EDL isn't the biggest scope on the shelf. It's the scope you'll actually use. It's light enough to mount on mid-range German equatorial heads like the iOptron GEM45 or Celestron CGX. It fits in a car without folding seats down. You can set up in a suburban driveway without your neighbors thinking you've installed a missile launcher. And the optics are good enough that when you point it at Saturn or M31 or the Orion Nebula, you'll stop thinking about the scope and start thinking about what you're seeing.\u003c\/p\u003e\n\u003ch3\u003eThe Optical Design\u003c\/h3\u003e\n\u003cp\u003eThe objective is a two-element air-spaced doublet. The primary element uses Ohara FCD-100 extra-low dispersion glass paired with a lanthanum crown element as the secondary. All four air-to-glass surfaces are fully multi-coated, delivering high light transmission and maximized contrast. When you look down the tube, you'll barely catch your own reflection — the coatings are that effective.\u003c\/p\u003e\n\u003cp\u003eFCD-100 is a material choice you'll see in premium camera optics and astronomy instruments. It's expensive. It's also precise in a way that cheaper ED glass isn't. The refractive index is controlled to tight tolerances, the dispersion curve is predictable across the visual spectrum, and paired with the right mating element and spacing, it eliminates false color to a degree that surprises observers coming from cheaper doublets or older triplet designs. The air-spaced configuration adds another layer of correction: it lets the lens elements work together to cancel secondary spectrum in a way that cemented designs can't.\u003c\/p\u003e\n\u003cp\u003eInside the tube, multiple knife-edge light baffles line the internal walls, and the focuser drawtube is fitted with micro baffles that block scattered light before it can reach the eyepiece. The objective lens edges are hand-blackened. This is stray-light suppression in the service of contrast — the kind of engineering that matters when you're chasing planetary detail or trying to split a close double star against the glare of a bright primary. On the Moon or Jupiter or M13, the difference between a scope with aggressive baffling and one without is immediately obvious to your eye.\u003c\/p\u003e\n\u003cp\u003eThe lens cell is precision-engineered and optimized during manufacturing. The elements arrive at your doorstep already performing at the factory guarantee. Unlike some entry-level doublets that ship loose or show signs of stress at the cell, the AT125EDL is built from the ground up to hold its collimation through years of use.\u003c\/p\u003e\n\u003ch3\u003eThe 2.5\" Rack-and-Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eThe focuser is a true 2.5-inch rack-and-pinion driven by helical gears with adjustable tension. Dual-speed mechanics with 10:1 fine focus reduction let you dial in precise focus for both visual observation and astrophotography. The drawtube has marked increments so you can log your best focus positions and return to them night after night. The 140mm back focus gives you plenty of room for accessory chains — visual back, diagonal, barlow, or an imaging train with typical camera and filter configurations.\u003c\/p\u003e\n\u003cp\u003eThe focuser body rotates 360° on the OTA, so you can position the focus knobs wherever your hand naturally falls. The 2-inch eyepiece assembly also rotates independently via the built-in camera angle adjuster — spin the eyepiece to frame a target or reposition a star diagonal without disturbing focus. Accessories are held by a brass compression ring with three locking thumbscrews, so you're not biting into your eyepiece barrels with metal set screws. A 1.25-inch adapter is included for smaller eyepieces.\u003c\/p\u003e\n\u003cp\u003eThe focuser lock is tight. No slop, no shift, no flexure. If you're moving from a Crayford focuser or a budget rack-and-pinion, the difference will be immediately obvious. This is the kind of focuser you can hang a moderate imaging rig on without watching the focus drift throughout the night.\u003c\/p\u003e\n\u003ch3\u003eBuilt for the Field\u003c\/h3\u003e\n\u003cp\u003eThe OTA weighs approximately 8.5 pounds on its own. Add the included tube rings, Vixen-style dovetail plate, and CNC carry handle, and you're still in featherweight territory — under ten pounds ready to mount. That puts the AT125EDL within easy reach of mounts like the iOptron CEM60, Celestron CGX-L, and even lighter heads on Takahashi or Vixen platforms. The retractable, self-storing dew shield keeps the overall profile manageable — extended for dew protection on humid nights, and tucks itself away when you need to fit the scope in a case or storage closet.\u003c\/p\u003e\n\u003cp\u003eThe tube rings are CNC machined and have threaded holes on top for attaching accessories — a guidescope bracket, a finderscope shoe, a camera plate. The carry handle is CNC machined to match, and it's built sturdy enough to be genuinely useful. A Synta-standard finder shoe is mounted on the focuser, so any Synta-compatible finder drops right in without adapters.\u003c\/p\u003e\n\u003cp\u003eThe scope ships in a nylon soft carry case with padding designed to protect the scope during transport and storage. The case itself is lightweight enough that one person can carry it from the car to the observing site without fatigue. If you're setting up in a driveway or at a local dark site, the AT125EDL packs down and travels like a real traveling scope — which is the entire point of building a five-inch refractor.\u003c\/p\u003e\n\u003cp\u003eThe white tube with Aston Martin Grey focuser and trim isn't just aesthetics — the light-colored tube resists heat buildup under daytime transport and helps the objective cool faster when you set up for evening observing. Darker tubes absorb sun and stay warm longer, increasing the time it takes to reach thermal equilibrium. On a cool night when you want to start observing quickly, every minute counts.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech AT125EDL 125mm f\/7.8 OTA with retractable dew shield\u003c\/li\u003e\n\u003cli\u003eCNC machined tube rings (pair) with threaded accessory holes\u003c\/li\u003e\n\u003cli\u003eVixen dovetail plate with two tube rings\u003c\/li\u003e\n\u003cli\u003eCNC carry handle\u003c\/li\u003e\n\u003cli\u003eSynta-standard finder shoe (mounted on focuser)\u003c\/li\u003e\n\u003cli\u003e1.25\" eyepiece adapter\u003c\/li\u003e\n\u003cli\u003e2\" and 1.25\" non-marring compression ring holders\u003c\/li\u003e\n\u003cli\u003eRetractable self-storing dew shield\u003c\/li\u003e\n\u003cli\u003eHard sided carry case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e125mm f\/7.8 FCD-100 and lanthanum air-spaced doublet.\u003c\/strong\u003e Ohara FCD-100 extra-low dispersion glass paired with a lanthanum crown element. Color correction that performs virtually indistinguishably from triple-element apochromats at the eyepiece. Fully multi-coated on all four air-to-glass surfaces for maximum light transmission and contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed minimum 0.95 Strehl ratio.\u003c\/strong\u003e Every AT125EDL is factory tested before it ships. FCD-100 paired with lanthanum and precision air-spacing delivers diffraction-limited performance across the visual spectrum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.5\" dual-speed rack-and-pinion focuser with 10:1 fine focus.\u003c\/strong\u003e True helical-gear focusing system with adjustable tension. 140mm back focus. Marked increments on the drawtube. Compression ring holders protect eyepieces and accessories. No set screws, no marring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° camera angle adjuster and 360° focuser body rotation.\u003c\/strong\u003e Rotate the eyepiece to frame targets, rotate the focuser body to position focus knobs comfortably. Independent adjustments that matter during long observing sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple knife-edge baffles plus micro baffles in the focuser drawtube.\u003c\/strong\u003e Hand-blackened objective lens edges. Aggressive stray-light suppression for maximum contrast on planets, the Moon, and tight double stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision-engineered lens cell.\u003c\/strong\u003e Factory optimized and arrives collimated. The build quality and material tolerance are designed to hold performance through years of use and transport.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhite tube with Aston Martin Grey focuser and trim.\u003c\/strong\u003e The light tube color resists heat buildup during transport and cool-down time. Professional aesthetic without compromising function.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC machined tube rings, Vixen dovetail plate, and carry handle included.\u003c\/strong\u003e No aftermarket hardware required. The rings have threaded holes on top for guidescope, finderscope, or camera brackets. The carry handle is genuinely useful for one-person setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable self-storing dew shield.\u003c\/strong\u003e Extends for protection on humid nights, tucks away for compact storage. Smooth operation, no springs to break, no sliding rings to jam.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eA 125mm refractor occupies the exact aperture sweet spot for amateur observers. Five inches isn't large enough to require a permanent observatory or a telescope dolly, but it's large enough that the jump in light grasp from smaller scopes feels meaningful. A 125mm collects roughly 2.5 times more light than an 80mm and about 50% more than a 102mm. In practice, what that means is that targets that require averted vision in a four-inch scope will show detail directly at the eyepiece in a 125. Deep-sky objects that looked faint and formless suddenly reveal structure. Planetary detail that was always just at the edge of visibility snaps into view.\u003c\/p\u003e\n\u003cp\u003eOn the planets, the AT125EDL will show you everything the best four-inch scopes can and then some. Jupiter's equatorial bands become subdivided into multiple zones with festoons and barges visible with steady seeing. Saturn's Cassini Division is a clean, dark line, and the ball of Saturn shows belt structure that smaller scopes can hint at but can't quite resolve. Mars near opposition will show dark albedo markings with excellent definition. The Moon is where a five-inch refractor truly performs — the terminator becomes a landscape of shadow detail, craterlets inside crater floors appear with surprising clarity, rilles thread across the maria with clean definition, and the Leibnitz and Tenner Mountains throw shadows that make the view feel three-dimensional.\u003c\/p\u003e\n\u003cp\u003eDouble-star observing in a 125mm is a joy. The theoretical resolution is approximately 0.93 arc-seconds. You'll split close pairs that are beyond the reach of 3-inch or 4-inch scopes, and the high-contrast, color-free images from the FCD-100 objective make it trivially easy to detect subtle color differences between components. A 125mm at f\/7.8 has enough light grasp to show color in double stars that other refractors barely separate, and the unobstructed aperture means the diffraction pattern is clean — no secondary mirror obstruction to scatter light into the rings and muddy the split.\u003c\/p\u003e\n\u003cp\u003eFor deep-sky, a 125mm f\/7.8 is still f\/7.8 — fast enough that you'll gather meaningful light on extended objects, but not so fast that the entire field becomes a pancake. Globular clusters that were barely resolvable at 3 or 4 inches begin to show resolved stars across their faces. Planetary nebulae reveal color and edge definition. Open clusters sparkle with clean pinpoint stars. Under dark skies, you'll see structure in galaxies like M51 and M101 that a smaller refractor won't show, and the contrast advantage of the unobstructed aperture will be immediately obvious on nebulae. An OIII filter through a 125mm on the Veil Nebula or Ring Nebula is a genuinely transformative observing experience.\u003c\/p\u003e\n\u003cp\u003eThe f\/7.8 ratio is a working compromise. It's not as fast as the AT115EDT (f\/7), but the five inches of aperture more than compensates. It's not as slow as the AT150EDL (f\/8), so you get usable wide fields without eyepieces that feel enormous. What you get is a sweet spot where planetary performance, deep-sky light gathering, and reasonable eyepiece selection all align. And because it's an air-spaced doublet using FCD-100 glass, the color correction is good enough that you can use aggressive magnifications on planets without false color degrading the view.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003e\"The more I use it, the more I love it. Great contrast, color correction is excellent, and it's light enough to take anywhere. This is the scope that gets used.\"\u003c\/em\u003e\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/f156\/at125edl-users-thread\/\"\u003eCloudy Nights AT125EDL Owners Thread\u003c\/a\u003e. This owner values portability and optical quality equally, and reports using the scope far more than heavier instruments in his collection.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"I've been very impressed with the optics. On Jupiter last week, I could count festoons in the belts and see detail I've never seen in a 102mm. For the money, this scope is excellent.\"\u003c\/em\u003e\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/f156\/at125edl-users-thread\/\"\u003eCloudy Nights AT125EDL Owners Thread\u003c\/a\u003e. This observer compared it directly to his existing 102mm and noticed the immediate step up in planetary detail and contrast.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eA 125mm f\/7.8 refractor likes a steady mount and patience with thermal equilibrium. Give the objective at least 20–30 minutes to reach ambient temperature after transport. The doublet is thicker than a triplet's individual elements, and it'll reward you for the wait. Start at moderate power (100–150×) and work up. On good nights, the AT125EDL will happily take 250× or higher on planets. Use the 10:1 fine focus — at high magnification, the difference between sharp and soft is a hair's width. Position the focus knobs where your hand falls naturally before you start observing. Small setup details add up over a long session. And don't overlook the finder shoe: a quality illuminated finder makes star-hopping and alignment quick and painless.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the AT125EDL compare to the AT115EDT triplet?\u003c\/strong\u003e\u003cbr\u003eThe AT115EDT is a three-element triplet at f\/7. The AT125EDL is a two-element doublet at f\/7.8 with more aperture. The triplet delivers slightly flatter color correction and a slightly wider usable field, particularly for imaging. The doublet delivers more light grasp, more planetary detail at high magnification, and a lower price point. For visual observing, most owners report the AT125EDL's extra aperture is worth more than the AT115EDT's slight optical edge. For narrowband astrophotography, the triplet may have a slight advantage. For visual and broadband imaging, the AT125EDL punches above its weight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does it compare to the AT102EDL?\u003c\/strong\u003e\u003cbr\u003eThe AT102EDL is 102mm f\/7 — also FCD-100 glass, also an excellent scope. The AT125EDL has 23mm more aperture, which means 50% more light grasp. That translates to noticeably brighter planetary views, more resolved stars in deep-sky objects, and faster deep-sky discovery. The jump from 102mm to 125mm is meaningful in a way that the jump from 80mm to 102mm is meaningful. If you can mount the five inches, the extra light is worth it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a good scope for astrophotography?\u003c\/strong\u003e\u003cbr\u003eYes, with asterisks. The 975mm focal length is usable for narrowband planetary imaging with a barlow or small-chip camera. Wide-field imaging is possible with a small-sensor camera or an astronomy camera. For traditional deep-sky imaging (galaxies, nebulae) on a full-frame DSLR or mirrorless body, the f\/7.8 ratio and 975mm focal length mean you'll be working with longer exposures than faster scopes, and stars will be somewhat small. The scope performs best as a visual instrument and good planetary imager. If your primary goal is wide-field galaxy or nebula work, a faster refractor or reflector might serve you better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003eThe OTA plus rings and dovetail weighs approximately ten pounds. A mount rated for 20–30 pounds will give you plenty of margin. The iOptron Gem45, Celestron CGEM II, and Losmandy GM-8 are all good matches. For imaging, the longer focal length (975mm) magnifies any tracking or stability issues, so don't skimp on mount quality if you're doing astrophotography. The scope works fine on Takahashi mounts or Vixen platforms with appropriate brackets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with a finder or eyepieces?\u003c\/strong\u003e\u003cbr\u003eNo. The AT125EDL ships as an OTA with rings, dovetail, handle, case, and finder shoe — but no finder and no eyepieces. A Synta-standard finder shoe is installed on the focuser, so any Synta-compatible finder will drop right in. For eyepieces, at 975mm focal length, a 20–24mm wide-field works for low power and deep-sky sweeping, a 10–13mm gives medium power and nice star clusters, and a 5–7mm is your planetary workhorse. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use a reducer or field flattener with this scope?\u003c\/strong\u003e\u003cbr\u003eYes. The AT125EDLRF 0.8× reducer\/flattener is available as an optional accessory. It reduces the focal length to 780mm at f\/6.2, flattens the field for imaging, and adds a red-filter element for narrowband astrophotography. With the reducer, the scope becomes a more effective imaging platform for moderate-sized sensors. Without the reducer, the scope performs best as a visual instrument and planetary imager.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the color correction compare to a triplet APO?\u003c\/strong\u003e\u003cbr\u003eA well-made air-spaced FCD-100 doublet corrects color to within whiskers of a triple-element apochromat. There is measurable secondary spectrum, but it's subtle enough at the eyepiece that most observers won't detect it, especially on the Moon and planets where contrast is high. On bright stars, you might see the faintest whisper of purple if you're looking for it and using extreme magnifications. Under real observing conditions, the color correction is excellent. If you're comparing specs on paper, the triplet wins. If you're comparing views at the eyepiece, many observers report they can't reliably tell the difference.\u003c\/p\u003e\n\u003ch3\u003eOptional Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech AT125EDLRF 0.8× Reducer\/Flattener:\u003c\/strong\u003e Reduces focal length to 780mm at f\/6.2, flattens the field for astrophotography, includes red-filter element for narrowband work. Transforms the scope into a more effective imaging platform.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech Illuminated Multiple Reticle Finder:\u003c\/strong\u003e Synta-standard shoe mount. Illuminated crosshairs with multiple reticle patterns for quick star-hopping and alignment. Genuinely useful for finding objects quickly in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 2\" 99% Reflectivity Dielectric Mirror Diagonal:\u003c\/strong\u003e A quality diagonal is essential for a scope at this level. Dielectric coating delivers near-total reflectivity — minimal light loss, maximum contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 13mm 100° Field Waterproof Eyepiece:\u003c\/strong\u003e At 975mm focal length, the 13mm delivers 75× with a full 100° apparent field. A stunning walk-through-space view of deep-sky objects, particularly open clusters and planetary nebulae.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT125EDL is for the observer or imager who wants five inches of aperture, genuine optical quality, and a scope light enough to take to dark skies on a whim. It punches above its price point because the FCD-100 and lanthanum doublet delivers color correction that rivals triplets three times the price, the mechanics — focuser, rings, dovetail — are genuinely premium, and the scope is built from the ground up to be used rather than looked at. If you've been eyeing the mid-aperture sweet spot and wondering whether a five-inch doublet can deliver, the answer is yes. The AT125EDL is the scope that changes that calculation. Pick it up, pack it, and go observe.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e125mm (4.9\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e975mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ef\/7.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eAir-spaced ED doublet (FCD-100 + lanthanum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully multi-coated (all air-to-glass surfaces)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eStrehl Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eGuaranteed minimum 0.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eLens Cell\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ePrecision-engineered, factory optimized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eInternal Baffles\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eMultiple knife-edge baffles + micro baffles in focuser drawtube; hand-blackened lens edges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser Type\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2.5\" dual-speed rack-and-pinion (helical gears)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFine Focus Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e10:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTotal Back Focus\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser Rotation\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e360° body rotation on OTA + 360° camera angle adjuster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAccessory Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2\" and 1.25\" non-marring compression rings; includes 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser Lock\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSolid lock (no image shift, no slop)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eRetractable, self-storing design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Finish\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eWhite tube; Aston Martin Grey focuser and trim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOTA Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e~12.3 lbs \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTotal Weight (with rings, dovetail, handle)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e~14.85 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eMounting System\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eCNC machined tube rings (pair) + Vixen dovetail plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCarry Handle\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eCNC machined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFinder Shoe\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSynta-standard (on focuser)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eStorage Case\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eNylon soft carry case with padding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTheoretical Resolution\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e~0.93 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eLight Grasp\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2.5× more than 80mm; ~50% more than 102mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481990770761,"sku":"AT125EDL","price":1699.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/astronomics_optimized-0085.jpg?v=1675379979"},{"product_id":"astro-tech-4mm-uwa-82-1-25-eyepiece","title":"Astro-Tech 4mm UWA 82° 1.25\" Eyepiece","description":"\u003cp\u003eFour millimeters is the extreme end of useful magnification in a 1.25\" eyepiece — the one you reach for when the atmosphere is dead calm and the planet is begging for more power. In a 1250mm Dob, that's 312x. In a 714mm refractor, 179x. In a 2032mm SCT, 508x. The 82° apparent field keeps the view comfortable and gives you real drift time even at these magnifications, where a narrow-field eyepiece would have you chasing the planet across a keyhole. With plenty of five-star reviews and a price that makes extreme magnification accessible, this is the eyepiece that lets you push your telescope to its atmospheric limit without pushing your budget.\u003c\/p\u003e\n\u003ch3\u003eThe Optics\u003c\/h3\u003e\n\u003cp\u003eSeven elements, fully multi-coated with blackened lens edges. At 4mm, optical quality is non-negotiable — the exit pupil is tiny, the magnification is extreme, and every flaw in the glass shows up immediately. The 4mm UWA delivers a sharp, contrasty image across the field. Alan Dyer's review in Cloudy Nights' Astro Gear Today tested the 4mm UWA in three different telescopes — a 94mm f\/5.5 refractor, a 105mm f\/6 Astro-Physics Traveler, and a 200mm f\/6 Dobsonian — and reported that it performs superbly.  No ghost images or flares were visible from bright objects in or just outside the field. The 82° field is wide enough to keep objects in view without constant nudging. The one optical note: the field stop is more softly defined than in premium models like the Nagler Type 6 — a small trade-off for the enormous cost saving.\u003c\/p\u003e\n\u003ch3\u003e1.25\" Barrel\u003c\/h3\u003e\n\u003cp\u003eFits any 1.25\" focuser, diagonal, or Barlow. Safety groove engages your focuser's thumbscrew. At just 164 grams (measured by Alan Dyer), the 4mm UWA is 60 grams lighter than the 5mm Nagler Type 6 and 77 grams lighter than the 3.5mm Type 6 — it won't present balance issues on any telescope. At 4mm, this is already extreme magnification in most telescopes — a Barlow would push it beyond what the atmosphere typically supports, but in smaller scopes (4–6 inches), a 2x Barlow turns the 4mm into an effectively 2mm eyepiece for those rare nights of exceptional seeing.\u003c\/p\u003e\n\u003ch3\u003eWaterproof\u003c\/h3\u003e\n\u003cp\u003eO-ring sealed and waterproof. Prevents internal fogging during cold planetary sessions — and at 4mm, you'll be using this eyepiece on the nights when the temperature has dropped and the seeing has stabilized, exactly when fogging is most likely. Keeps dust and grit out of the optics and protects the coatings from humidity and fungus.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech 4mm 82° UWA 1.25\" eyepiece\u003c\/li\u003e\n\u003cli\u003eLens caps (top and bottom)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e82° apparent field of view\u003c\/strong\u003e — At extreme magnification, the wider field is the difference between comfortable observing and constant nudging. More drift time on untracked telescopes, more context around the target.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7-element fully multi-coated optics\u003c\/strong\u003e — High contrast with controlled scatter. Owners choose it over premium alternatives at several times the price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4mm focal length\u003c\/strong\u003e — Extreme power. 312x in a 1250mm Dob, 179x in a 714mm refractor, 508x in a 2032mm SCT. The eyepiece for the steadiest nights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12mm eye relief\u003c\/strong\u003e — Exceptional for a 4mm eyepiece. Most 4mm eyepieces force you to press your eye against the lens. This one doesn't.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof, O-ring sealed\u003c\/strong\u003e — Cold-weather performance and long-term protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" barrel with safety groove\u003c\/strong\u003e — Universal compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight\u003c\/strong\u003e — No balance concerns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eIn a 10-inch f\/5 Dob at 312x, Jupiter on a steady night shows the two equatorial belts with festoons, barges, and scalloping in real detail. The Great Red Spot shows internal structure — not just color and shape, but the wake turbulence trailing behind it. On the best nights, four or five belts are visible with hints of detail in each. The Galilean moons show disks, not points. The 82° field holds the planet for about 20 seconds of drift — enough time to study a feature before nudging the scope.\u003c\/p\u003e\n\u003cp\u003eSaturn at 312x shows the ring system in fine detail. Cassini's Division is a broad dark gap, not a thin line. The Encke minimum is visible on the best nights. The shadow of the globe on the rings shows crisp geometry. Multiple moons are visible around the planet. The crepe ring is distinct against the globe.\u003c\/p\u003e\n\u003cp\u003eThe Moon at 312x is where extreme magnification pays off most, because the Moon is bright enough to tolerate high power even on average nights. Crater floors show fine detail — rilles, secondary impacts, slumped walls. The Straight Wall shows as a true shadow line. Hadley Rille, the Apollo 15 landing site valley, is resolvable. You're looking at the Moon the way spacecraft see it.\u003c\/p\u003e\n\u003cp\u003eMars during opposition at 312x shows the dark surface markings — Syrtis Major, Hellas Basin, and the polar caps — with enough resolution to track changes from night to night. This is the eyepiece you wait all opposition season to use, saving it for the one or two nights when the seeing is truly exceptional.\u003c\/p\u003e\n\u003cp\u003eFor deep-sky, 312x is specialized territory: planetary nebulae like NGC 7662 (Blue Snowball) and NGC 6826 (Blinking Planetary) show disk structure. Tight double stars split cleanly — Dawes' limit territory in a 10-inch scope. Compact globulars resolve to the core.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\"Performs superbly.\" This reviewer tested the 4mm UWA in three telescopes — a 94mm f\/5.5 refractor, a 105mm f\/6 Astro-Physics Traveler, and a 200mm f\/6 Dobsonian — and compared it directly to a 3.5mm TeleVue Delos at more than twice the price. The verdict: very similar views for sharpness, contrast, and neutral color. A Jovian moon transit was equally crisp in both eyepieces. The only trade-offs: a softly defined field stop compared to the Nagler Type 6, and some sensitivity to kidney-bean blackout that resolves with practice positioning the eye against the soft eyecup. At 164 grams, it's lighter than both the Nagler and Delos alternatives. — \u003ca href=\"https:\/\/www.cloudynights.com\/articles\/astro-gear-today\/reviews\/an-82-eyepiece-for-just-036100-astro-tech-4mm-uwa-review-r4604\/\"\u003eCloudy Nights Astro Gear Today review\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eThe 4mm UWA is a seeing-limited eyepiece. On most nights, the atmosphere won't support this magnification — the image will be soft and boiling. That's not the eyepiece; that's the air. Start your session with a longer focal length, work your way up, and reach for the 4mm only when the image at lower power is steady and sharp. When the seeing cooperates — and you'll know immediately — the jump in detail is dramatic. Patience with the atmosphere is the skill that makes this eyepiece worth owning.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does this compare to the 4.8mm 110° XWA?\u003c\/strong\u003e\u003cbr\u003eThe 4.8mm XWA has a wider field (110° vs. 82°), slightly longer focal length (4.8mm vs. 4mm), 15mm eye relief (vs. 12mm), and a dual 1.25\"\/2\" barrel. The 4.8mm XWA is 8 elements versus 7, and weighs 19 oz versus the UWA's 164 grams (~5.8 oz). The 4mm UWA gives you slightly more magnification and costs significantly less. If you want the widest possible field and don't mind the weight and price, the XWA is the step up. If you want extreme magnification at a fraction of the cost, the UWA delivers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs 312x too much for my telescope?\u003c\/strong\u003e\u003cbr\u003eThe rule of thumb is 50x per inch of aperture as a practical ceiling — so 312x is reasonable for a 10-inch scope but pushing it for a 6-inch. In a 4-inch refractor at 179x (from a 714mm focal length), you're at a very comfortable power. The atmosphere, not the telescope, usually sets the limit. On most nights, 200–250x is the practical ceiling regardless of aperture. The 4mm UWA is the eyepiece for the nights that exceed that ceiling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this parfocal with the other 82° UWAs?\u003c\/strong\u003e\u003cbr\u003eYes — confirmed by Cloudy Nights members. One owner tested all five 1.25\" UWAs (4mm through 16mm) and found them parfocal, requiring only a small touch of the focuser when swapping between focal lengths.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this with an AT102ED?\u003c\/strong\u003e\u003cbr\u003eYes. One owner reports excellent results with the AT102ED. At 714mm focal length, the 4mm gives you 179x — well within the scope's capabilities and a very effective planetary magnification for a 4-inch ED doublet.\u003c\/p\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe 4mm UWA is the extreme-magnification specialist of the Astro-Tech 82° line — the eyepiece you buy knowing you won't use it every night, but knowing that when you do, nothing else in the case will show you what this one shows you. Alan Dyer's review for Cloudy Nights puts it plainly: it performs superbly. At 4mm, 82° field, 12mm eye relief, and 164 grams, it's an invitation to push your telescope to its limits on the nights that deserve it.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e82°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Elements\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e7 elements, fully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — O-ring sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481993883721,"sku":"ATUWA04","price":95.96,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/hart0024.jpg?v=1675380193"},{"product_id":"astro-tech-10mm-uwa-82-1-25-eyepiece","title":"Astro-Tech 10mm UWA 82° 1.25\" Eyepiece","description":"\u003cp\u003eTen millimeters splits the difference between deep-sky and planetary magnification — high enough to resolve globular clusters and show structure in planetary nebulae, versatile enough to frame compact open clusters with surrounding star field. In a 10-inch f\/5 Dob, it delivers 125x and about 40 arc-minutes of true field. In an f\/7 refractor, 71x with just over a degree of sky. One owner tried this eyepiece after investing in ultra-premium eyepieces and came away impressed — calling it \"premium performance at a sensible price.\" With 16 five-star reviews, the pattern is clear: this eyepiece punches well above its price point.\u003c\/p\u003e\n\u003ch3\u003eThe Optics\u003c\/h3\u003e\n\u003cp\u003eSeven elements, fully multi-coated. The 82° apparent field provides a wide, immersive view without the optical complexity — or the price — of a 100° design. Fewer glass surfaces mean less scattered light and higher contrast, which matters when you're trying to detect subtle detail in planetary nebulae or faint structure in galaxies. The correction holds well across the field in moderate and slow focal-ratio scopes. In fast Dobs (f\/4.5–f\/5), the outer 10% may soften slightly — normal for any wide-field 1.25\" eyepiece. Cloudy Nights members rate the 10mm as one of the strongest performers in the UWA line — a reviewer testing it in an AT102EDL f\/7 apo found all three mid-range UWAs (7mm, 10mm, 13mm) very sharp, with M3, M92, and M13 showing graininess with averted vision even from Bortle 8–9 skies in a 4-inch refractor.\u003c\/p\u003e\n\u003ch3\u003e1.25\" Barrel\u003c\/h3\u003e\n\u003cp\u003eFits any 1.25\" focuser, diagonal, or Barlow. Safety groove engages your focuser's thumbscrew for secure retention. Lightweight and compact — no balance issues on any telescope.\u003c\/p\u003e\n\u003ch3\u003eWaterproof\u003c\/h3\u003e\n\u003cp\u003eO-ring sealed and waterproof. Prevents internal fogging, dust intrusion, and fungus. The sealed construction extends the optical life of the eyepiece.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech 10mm 82° UWA 1.25\" eyepiece\u003c\/li\u003e\n\u003cli\u003eLens caps (top and bottom)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e82° apparent field of view\u003c\/strong\u003e — Nearly three times the area of a standard Plossl. Wide enough to be immersive while maintaining high contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7-element fully multi-coated optics\u003c\/strong\u003e — High contrast, good edge correction, minimal scatter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm focal length\u003c\/strong\u003e — The bridge between deep-sky and planetary power. 125x in a 1250mm Dob, 71x in a 714mm refractor, 203x in a 2032mm SCT.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12mm eye relief\u003c\/strong\u003e — Comfortable without glasses. Tight for eyeglass wearers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof, O-ring sealed\u003c\/strong\u003e — Cold-weather ready. Dust and fungus resistant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" barrel with safety groove\u003c\/strong\u003e — Universal 1.25\" compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight\u003c\/strong\u003e — No balance concerns on any telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eIn a 10-inch Dob at 125x, globular clusters hit their visual peak. M13 resolves into individual stars across the entire face — chains, lanes, and a dense core that starts to granulate. M3 shows its characteristic loose, spangled structure. M5 reveals its elongated shape. This is the magnification range where the difference between \"a fuzzy ball\" and \"a resolved cluster\" becomes dramatic.\u003c\/p\u003e\n\u003cp\u003ePlanetary nebulae are well served at 125x. M57 shows its ring shape clearly. NGC 6826, the Blinking Planetary, is large enough to show its disk and does its signature \"blinking\" trick when you shift between direct and averted vision. M27 fills a meaningful portion of the field with its apple-core structure visible.\u003c\/p\u003e\n\u003cp\u003eOn planets, 125x is a good working magnification. Jupiter shows the equatorial belts with visible detail on steady nights. Saturn's rings are well separated with Cassini's Division clear. Mars at opposition shows major surface features. The 82° field provides comfortable drift time on an untracked Dob.\u003c\/p\u003e\n\u003cp\u003eIn a refractor at 71x, the 10mm works beautifully on compact open clusters — M11, the Wild Duck Cluster, resolves into a dense swarm of stars. NGC 884\/885, the Double Cluster, shows both clusters fully resolved with the surrounding field stars providing context.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\"All three UWAs are very sharp.\" This owner tested the 7mm, 10mm, and 13mm in an AT102EDL f\/7 from Bortle 8–9 skies and found globular clusters showed graininess with averted vision even in a 4-inch refractor — a sign of real resolving power at the edge of what the aperture can deliver. — \u003ca href=\"https:\/\/www.cloudynights.com\/topic\/876989-review-of-the-7mm-10mm-13mm-at-uwa-82-eyepieces\/\"\u003eCloudy Nights AT UWA 7mm\/10mm\/13mm review\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\"Best deal in EPs...ever.\" This owner bought the full 4mm–16mm set after testing one. — \u003ca href=\"https:\/\/www.cloudynights.com\/topic\/876989-review-of-the-7mm-10mm-13mm-at-uwa-82-eyepieces\/\"\u003eCloudy Nights AT UWA discussion\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eThe 10mm UWA is the ideal magnification for the Messier marathon. At 125x in a 10-inch Dob, it shows enough detail to positively identify objects while holding a field wide enough to find them by star-hopping. For the spring Messier marathon, this single eyepiece can handle everything from the galaxies of Virgo to the globulars of Ophiuchus to the nebulae of Sagittarius — the only targets that benefit from switching are the very faintest galaxies (drop to lower power) and planets (step up for more detail).\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does this compare to a 10mm Plossl?\u003c\/strong\u003e\u003cbr\u003eThe 82° UWA shows nearly three times more sky area than a 50° Plossl at the same magnification. The Plossl has the advantage of simplicity (fewer elements), longer eye relief at this focal length, and lower cost. But the viewing experience is dramatically different — the UWA's wider field changes how you observe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this parfocal with the other 82° UWAs?\u003c\/strong\u003e\u003cbr\u003eYes — confirmed by Cloudy Nights members. One owner tested all five 1.25\" UWAs (4mm through 16mm) and confirmed they are parfocal with each other, requiring only a small touch of the focuser when swapping. The UWAs are not parfocal with TeleVue Group B eyepieces, so expect a larger adjustment if mixing brands.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this work well in an SCT?\u003c\/strong\u003e\u003cbr\u003eYes. In a typical 8-inch f\/10 SCT (2032mm), the 10mm gives you 203x — excellent for planetary work. The relatively slow f\/10 focal ratio is easy on any eyepiece, so the 82° UWA will deliver sharp stars to the edge of the field.\u003c\/p\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe 10mm UWA is where globular clusters come alive, planetary nebulae reveal their structure, and planets start showing real detail — all through a compact 1.25\" eyepiece that fits any telescope. At 82°, the field is wide enough to observe in comfort. At 7 elements, the contrast stays high. And at this price, it's the kind of eyepiece that makes the ultra-premium alternatives hard to justify for most observers. Sixteen five-star reviews from owners using everything from Dobs to refractors to SCTs all point the same direction: this is premium performance in a sensible package.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e82°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Elements\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e7 elements, fully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — O-ring sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481993949257,"sku":"ATUWA10","price":95.96,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/image_9d740345-b19f-42e9-8524-9452ab88d55f.png?v=1708535957"},{"product_id":"astro-tech-13mm-uwa-82-1-25-eyepiece","title":"Astro-Tech 13mm UWA 82° 1.25\" Eyepiece","description":"\u003cp\u003eThe 13mm is the transition point — high enough magnification to show real detail in globular clusters and planetary nebulae, low enough to hold a useful true field for open clusters and galaxy groups. In a 10-inch f\/5 Dob, it gives you 96x and just under a degree of sky in the eyepiece. In an f\/7 refractor, 55x with 1.5° of field. The 82° apparent field wraps around the view in a way that standard eyepieces can't match, and the 7-element design keeps contrast high while staying light enough to fit any 1.25\" focuser without shifting the balance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Optics\u003c\/h3\u003e\n\n\u003cp\u003eSeven elements, fully multi-coated. The 82° UWA design balances field width against optical complexity — wide enough to be immersive, simple enough to maintain high contrast with minimal scatter. The image is sharp across the center and middle zones with well-controlled astigmatism and field curvature. One owner bought a pair for binocular telescopes and calls them \"mainstays.\" Cloudy Nights members rate the 13mm as sharper to the edge than the 16mm in fast scopes, with one reviewer calling it and its siblings \"very sharp\" in an AT102EDL f\/7 apo — the Moon showed beautiful crispness, and double stars like Izar split cleanly with the blue companion embedded in the diffraction ring at 200x with a Barlow.\u003c\/p\u003e\n\n\u003ch3\u003e1.25\" Barrel\u003c\/h3\u003e\n\n\u003cp\u003eFits any 1.25\" focuser, diagonal, or Barlow. A safety groove is machined into the barrel to engage your focuser's thumbscrew. The eyepiece is lightweight — it won't change the balance on any telescope.\u003c\/p\u003e\n\n\u003ch3\u003eWaterproof\u003c\/h3\u003e\n\n\u003cp\u003eO-ring sealed and waterproof. Prevents internal fogging at cold temperatures, keeps dust out, and protects the internal coatings over the life of the eyepiece.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAstro-Tech 13mm 82° UWA 1.25\" eyepiece\u003c\/li\u003e\n  \u003cli\u003eLens caps (top and bottom)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e82° apparent field of view\u003c\/strong\u003e — Nearly three times the area of a standard 50° Plossl. Wide enough to show targets in their surrounding context.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7-element fully multi-coated optics\u003c\/strong\u003e — High contrast, controlled scatter, good edge correction.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e13mm focal length\u003c\/strong\u003e — Mid-power versatility. 96x in a 1250mm Dob, 55x in a 714mm refractor, 156x in a 2032mm SCT. Works on nebulae, clusters, galaxies, and planets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12mm eye relief\u003c\/strong\u003e — Comfortable without glasses. Tight for eyeglass wearers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWaterproof, O-ring sealed\u003c\/strong\u003e — Cold-weather performance and long-term optical protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1.25\" barrel with safety groove\u003c\/strong\u003e — Universal compatibility. Thumbscrew retention.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLightweight\u003c\/strong\u003e — No balance issues on any telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\n\u003cp\u003eIn a 10-inch Dob at 96x, M13 resolves individual stars across its face — not just at the edges, but threading into the core. M57, the Ring Nebula, shows its oval shape clearly with the central hole defined. The Orion Nebula at this power shows the Trapezium cleanly split against the bright nebulosity, with the wings extending well beyond. A Cloudy Nights reviewer using an AT102EDL f\/7 in Bortle 8–9 skies reported the Beehive Cluster as an impressive sight, fitting comfortably inside the 82° field at 55x — the kind of target that rewards a wide field by showing the cluster in its full context against the surrounding star field.\u003c\/p\u003e\n\n\u003cp\u003eJupiter shows both equatorial belts with hints of festoons on steady nights. Saturn's rings are separated from the globe with Cassini's Division visible. The 82° field gives you comfortable drift time on an untracked Dob — roughly 40 seconds before a planet exits the view at this magnification.\u003c\/p\u003e\n\n\u003cp\u003eIn a short refractor at 55x, the field is wide enough for open clusters like M35, M37, and the Double Cluster. Galaxy groups in Virgo and Leo show multiple members in a single field. The sky background is dark enough to bring out faint nebulosity on the Veil and the North America with a filter.\u003c\/p\u003e\n\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\n\u003cp\u003e\"All three UWAs are very sharp.\" This owner tested the 7mm, 10mm, and 13mm in an AT102EDL f\/7 from Bortle 8–9 skies and found the 13mm delivered beautiful crispness on the Moon and split Izar cleanly at 200x with a Barlow — the blue companion embedded in the diffraction ring. The Beehive at 55x filled the 82° field and showed the cluster in full context against the surrounding star field. — \u003ca href=\"https:\/\/www.cloudynights.com\/topic\/876989-review-of-the-7mm-10mm-13mm-at-uwa-82-eyepieces\/\"\u003eCloudy Nights AT UWA 7mm\/10mm\/13mm review\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\"Best deal in EPs...ever.\" This owner bought the full 4mm–16mm set after testing one. — \u003ca href=\"https:\/\/www.cloudynights.com\/topic\/876989-review-of-the-7mm-10mm-13mm-at-uwa-82-eyepieces\/\"\u003eCloudy Nights AT UWA discussion\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\n\u003cp\u003eThe 13mm UWA makes a natural partner for the 7mm UWA — one gives you the mid-power survey view, the other zooms in for detail. Together they cover the range from deep-sky scanning to planetary close-ups, and both fit a 1.25\" focuser without adapters. Add the 10mm to split the difference, and you have a three-eyepiece set that handles virtually any target from any telescope.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does this compare to the 13mm 100° XWA?\u003c\/strong\u003e\u003cbr\u003e\nThe 100° XWA has a wider apparent field (100° vs. 82°), more elements (9 vs. 7), is waterproof (both are), has 15mm eye relief (vs. 12mm here), and is heavier (19 oz vs. lightweight). The XWA is the premium option. The 82° UWA is the lighter, more affordable choice that still delivers a wide field with high contrast. If 82° is wide enough for your needs, the UWA gives you excellent performance at a lower price.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this parfocal with the other 82° UWAs?\u003c\/strong\u003e\u003cbr\u003e\nThe Astro-Tech 82° UWA eyepieces are close to parfocal with each other. You'll need only a small focus adjustment when swapping between focal lengths in the line.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this in a binoviewer?\u003c\/strong\u003e\u003cbr\u003e\nYes. One owner bought a matched pair for binocular telescopes and rates them highly. The 1.25\" barrel and lightweight construction make them well suited for binoviewer use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this work in a fast Dobsonian?\u003c\/strong\u003e\u003cbr\u003e\nYes. The optical design handles fast focal ratios well. At f\/4.5–f\/5, you may see some softening in the last 10% of the field — normal for any 82° eyepiece at fast ratios. A coma corrector like a Paracorr will clean up the outer field if it bothers you.\u003c\/p\u003e\n\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\n\u003cp\u003eThe 13mm UWA is the middle of the 82° line — the focal length that does a bit of everything without specializing in anything. It resolves globular clusters, shows planetary detail, frames open clusters in context, and holds a useful field on galaxies. At 1.25\", 7 elements, and a lightweight build, it fits any telescope and any budget. Fourteen five-star reviews and an owner who bought two for binocular use tell the story: this eyepiece delivers more than its price suggests, and it works reliably session after session.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e13mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e82°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Elements\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e7 elements, fully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — O-ring sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481993982025,"sku":"ATUWA13","price":95.96,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/image_6ddbf930-3446-4969-bea0-1baa238a6e26.png?v=1675664629"},{"product_id":"astro-tech-16mm-uwa-82-1-25-eyepiece","title":"Astro-Tech 16mm UWA 82° 1.25\" Eyepiece","description":"\u003cp\u003eSixteen millimeters is the all-rounder focal length in a 1.25\" barrel. In a 10-inch f\/5 Dob, it gives you 78x — high enough to darken the sky background and pull detail out of nebulae, low enough to hold a full degree of true field for open clusters and galaxy groups. In a 4-inch f\/7 refractor, it delivers 45x with a 1.8° field: the deep-sky workhorse. At 6 ounces, it barely changes the balance of any scope, and at 7 elements it holds contrast and sharpness across an 82° field that makes standard eyepieces feel cramped. This is the eyepiece owners describe as the one they reach for first.\u003c\/p\u003e\n\n\u003ch3\u003eThe Optics\u003c\/h3\u003e\n\n\u003cp\u003eSeven elements, fully multi-coated. The 82° design strikes a practical balance — wide enough to be immersive, simple enough to keep contrast high and weight low. The image is sharp across the center and middle zones with well-controlled astigmatism. One owner uses it on a 10-inch Dob and a 6-inch Meade ACF; another pairs it with a 4-inch refractor. Cloudy Nights members note that edge correction at f\/5 is not quite as tight as the shorter focal length UWAs in the line — the 13mm, 10mm, and 7mm are sharper to the edge at fast ratios. In slower scopes (f\/6 and above), the difference narrows and most observers report excellent performance across the field. A detailed CN comparison with the 16mm Nagler Type 5 found the Nagler has better edge correction, but the AT 16mm UWA has noticeably more eye relief and costs significantly less. Both delivered sharp center-field images.\u003c\/p\u003e\n\n\u003ch3\u003e1.25\" Barrel\u003c\/h3\u003e\n\n\u003cp\u003eThis eyepiece fits any 1.25\" focuser, diagonal, or Barlow — universal compatibility. A safety groove is machined into the barrel to engage your focuser's thumbscrew. At 6 ounces, it's lighter than most kit eyepieces, and it won't tip the balance on even the lightest refractor or tabletop Dob.\u003c\/p\u003e\n\n\u003ch3\u003eWaterproof\u003c\/h3\u003e\n\n\u003cp\u003eO-ring sealed and waterproof. The practical benefits: no internal fogging at cold temperatures, no dust intrusion, and the internal coatings stay protected from humidity and fungus for the life of the eyepiece.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAstro-Tech 16mm 82° UWA 1.25\" eyepiece\u003c\/li\u003e\n  \u003cli\u003eLens caps (top and bottom)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e82° apparent field of view\u003c\/strong\u003e — Nearly three times the sky area of a 50° Plossl. Wide enough to show deep-sky objects in context with their surrounding star fields.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e7-element fully multi-coated optics\u003c\/strong\u003e — High contrast and edge sharpness. Fewer elements than 100° designs means less scattered light.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e16mm focal length\u003c\/strong\u003e — The versatile mid-power focal length. 78x in a 1250mm Dob, 45x in a 714mm refractor, 127x in a 2032mm SCT. Useful on everything from nebulae to planets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12mm eye relief\u003c\/strong\u003e — Comfortable without glasses. Tight for eyeglass wearers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWaterproof, O-ring sealed\u003c\/strong\u003e — Cold-weather performance, dust resistance, coating protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1.25\" barrel with safety groove\u003c\/strong\u003e — Fits any 1.25\" focuser, diagonal, or Barlow. Thumbscrew retention.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6 ounces\u003c\/strong\u003e — Light enough for any scope. No balance issues.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\n\u003cp\u003eIn a 10-inch f\/5 Dob at 78x, the 16mm UWA sits in the sweet spot between wide field and useful magnification. M42 shows the wings of nebulosity extending out from the Trapezium with the sky background dark enough to bring out faint structure. M13 begins to resolve individual stars across its face, not just at the edges. M27, the Dumbbell, shows its apple-core shape clearly against a dark field.\u003c\/p\u003e\n\n\u003cp\u003eIn a 4-inch refractor at 45x, you get a 1.8° true field — the Double Cluster fits comfortably with surrounding star field. The Pleiades show all the bright members. M35 and its companion NGC 2158 share the field, the main cluster resolved into bright chains and the companion a soft glow behind it.\u003c\/p\u003e\n\n\u003cp\u003eOn planets, 78x in a 10-inch is a useful starting magnification. Jupiter shows both equatorial belts and the Galilean moons as distinct points. Saturn's rings are clearly separated from the globe. The wide 82° field gives you generous drift time on an untracked Dob.\u003c\/p\u003e\n\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\n\u003cp\u003eThe 16mm is the most discussed focal length in the UWA line on Cloudy Nights. A detailed side-by-side comparison with the 16mm Nagler Type 5 found the Nagler has better edge correction, but the AT 16mm UWA has noticeably more eye relief and costs significantly less.\u003cbr\u003e\n— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/841679-comparsionunboxing-16mm-nagler-t5-and-astro-tech-16mm-uwa\/\"\u003eCloudy Nights 16mm Nagler T5 vs AT 16mm UWA comparison\u003c\/a\u003e. This owner tested both in a TV-76 refractor and measured the eye relief, parfocality, and edge correction differences in daylight and at night.\u003c\/p\u003e\n\n\u003cp\u003eIn fast scopes at f\/5, CN members note the 16mm shows more edge softening than the shorter focal length UWAs — the 13mm, 10mm, and 7mm are sharper to the edge at fast ratios. In slower scopes (f\/6 and above), the difference narrows and most observers report excellent performance across the field.\u003cbr\u003e\n— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/891736-astrotech-82-degree-uwa-eyepieces\/\"\u003eCloudy Nights UWA Eyepieces discussion\u003c\/a\u003e. This owner, an experienced reviewer, contextualized the 16mm's edge performance against the full UWA line and emphasized that scope focal ratio matters more than the eyepiece itself.\u003c\/p\u003e\n\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\n\u003cp\u003eThe 16mm UWA makes an excellent first upgrade from a kit Plossl. It delivers more field, better contrast, and sharper edges than most 25mm Plossls while providing more magnification. If you're building your first serious eyepiece set, start here — the 16mm covers the most ground across the widest range of objects and telescopes. Add the 7mm UWA for high power and the 10mm for a step between them, and you have a three-eyepiece set that handles everything from rich-field scanning to planetary detail.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this parfocal with the other UWAs in the line?\u003c\/strong\u003e\u003cbr\u003e\nYes — confirmed by Cloudy Nights members. One owner tested all five 1.25\" UWAs (4mm through 16mm) and confirmed they are parfocal with each other. Another measured the 16mm UWA and 4mm UWA at about 1.3mm apart in focus position — close enough that a small touch of the focuser is all that's needed. The UWAs are not parfocal with TeleVue Group B eyepieces, so if you're mixing brands, expect a larger focus adjustment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow does this compare to a 15mm Plossl?\u003c\/strong\u003e\u003cbr\u003e\nThe 82° UWA shows nearly three times more sky than a 50° Plossl at the same focal length, with better edge correction and higher contrast. The Plossl wins on simplicity (fewer elements), eye relief (Plossls at this focal length typically have longer eye relief), and price. But the viewing experience is in a different category.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this with a 2\" diagonal?\u003c\/strong\u003e\u003cbr\u003e\nYes, with a 1.25\" adapter in your 2\" diagonal. Most 2\" diagonals come with a 1.25\" adapter. The eyepiece will also work directly in any 1.25\" diagonal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this good for astrophotography?\u003c\/strong\u003e\u003cbr\u003e\nEyepieces are designed for visual use, not imaging. For astrophotography through a telescope, you'll want a camera adapter that connects directly to the focuser or a dedicated camera eyepiece projection system. This eyepiece is optimized for the eye, not a camera sensor.\u003c\/p\u003e\n\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\n\u003cp\u003eThe 16mm UWA is the workhorse of the 82° line — the eyepiece that handles more targets on more telescopes than any other focal length in the set. It's the mid-power choice that works on nebulae, clusters, galaxies, and planets without being specialized for any one of them. At 6 ounces and 1.25\", it fits every scope and changes the balance of none. Eight five-star reviews from owners using everything from 4-inch refractors to 10-inch Dobs say the same thing: this is the eyepiece you put in first and take out last. If you're buying one UWA to start with, this is a strong choice.\u003c\/p\u003e\n\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e82°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Elements\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e7 elements, fully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — O-ring sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e6 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481994014793,"sku":"ATUWA16","price":95.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/image_3ab87f0f-652a-4d10-9fe5-cf23d2e1da7b.png?v=1675664944"},{"product_id":"astro-tech-9mm-100-field-waterproof-1-25-2-eyepiece","title":"Astro-Tech 9mm 100° Field Waterproof 1.25\"\/2\" Eyepiece","description":"\u003cp\u003eNine millimeters is where the view starts to get serious. In a 10-inch f\/5 Dobsonian, it gives you 139x — enough to split tight double stars, pull detail out of planetary nebulae, and show Jupiter's cloud belts with real structure. In an f\/7 refractor, it runs 79x with a half-degree true field: tight enough for planets, wide enough for compact clusters. The challenge at this magnification is usually the eyepiece — most high-power eyepieces give you a narrow apparent field, so you're constantly bumping the Dob to keep the target in view. The 9mm XWA solves that with 100° of apparent field. Objects drift through slowly. You observe instead of chase.\u003c\/p\u003e\n\u003ch3\u003eThe Optics\u003c\/h3\u003e\n\u003cp\u003eNine elements, fully multi-coated with blackened lens edges. The design is corrected for telescopes as fast as f\/4 — one Yotpo reviewer reports sharp, high-contrast views to the edge of the field in an f\/4.9 Dobsonian. On Cloudy Nights, a detailed observing report from a 10-inch f\/4.7 Dob user (same optical design, branded Sky Rover) describes the 9mm as delivering sharp images, excellent contrast, and saturated color rendition on everything from Venus to the Orion Nebula — calling M42 \"simply stunning\" and the Moon \"my best ever view\" through the eyepiece's 100° field. At f\/5 and slower, the field is sharp essentially to the stop.\u003c\/p\u003e\n\u003ch3\u003eEye Relief\u003c\/h3\u003e\n\u003cp\u003eEye relief is 13mm — shorter than the 20mm and 13mm XWAs in this line, which have 15mm. For observers without glasses, 13mm is comfortable enough for extended sessions. For eyeglass wearers, it's tight. You can still use the eyepiece with glasses, but you'll lose more of the outer field than you would with the longer-focal-length XWAs. The soft rolldown eyecup helps — fold it down to get your glasses closer to the eye lens.\u003c\/p\u003e\n\u003ch3\u003eDual 1.25\"\/2\" Barrel\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece comes with a removable 2\" collar. Take it off and you have a 1.25\" barrel for smaller focusers, diagonals, and Barlows. Both barrels have a safety groove machined into the chrome to engage your focuser's thumbscrew. At 17 ounces, the eyepiece is lighter than the 20mm and 13mm XWAs — the shorter focal length means a smaller optical assembly — but it's still heavier than a typical Plossl or orthoscopic at this focal length.\u003c\/p\u003e\n\u003ch3\u003eWaterproof\u003c\/h3\u003e\n\u003cp\u003eO-ring sealed and waterproof. No internal fogging at freezing temperatures, no dust intrusion, no fungus on the interior elements. The sealed construction also makes exterior cleaning simpler — no risk of cleaning solution seeping past the lens edge into the interior.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech 9mm 100° XWA 1.25\"\/2\" eyepiece\u003c\/li\u003e\n\u003cli\u003eRemovable 2\" collar (installed)\u003c\/li\u003e\n\u003cli\u003eLens caps (top and bottom)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100° apparent field of view\u003c\/strong\u003e — At high magnification, the wide field is a practical advantage, not just a luxury. Objects stay in view longer on untracked telescopes, and you see the target in context rather than isolated in a narrow tunnel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9-element fully multi-coated optics\u003c\/strong\u003e — Blackened lens edges, designed for edge sharpness and high contrast at focal ratios down to f\/4. Performs cleanly in fast Dobsonians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9mm focal length\u003c\/strong\u003e — High-power territory. 139x in a 1250mm Dob, 111x in a 1000mm scope, 79x in a 714mm refractor. Useful for planets, planetary nebulae, globular cluster detail, double stars, and lunar close-ups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e13mm eye relief\u003c\/strong\u003e — Comfortable without glasses. Tight but usable with glasses — the rolldown eyecup helps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual 1.25\"\/2\" barrel\u003c\/strong\u003e — Removable 2\" collar. Safety groove on both barrels engages your focuser thumbscrew.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof, O-ring sealed\u003c\/strong\u003e — Prevents internal fogging, dust intrusion, and fungus. Extends the life of the optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17 ounces\u003c\/strong\u003e — Lighter than the longer-focal-length XWAs in the line, but still a substantial eyepiece.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eIn a 10-inch f\/5 Dobsonian at 139x, Jupiter shows the two main equatorial belts with visible festoons and scalloping on good nights. The Great Red Spot shows color and shape when it transits. Saturn's rings are cleanly separated from the globe, Cassini's Division is a dark line on steady nights, and the shadow of the rings on the globe is visible. The 100° field means the planet drifts slowly across the view — you get a solid 45–60 seconds of observing before the planet reaches the edge, compared to maybe 30 seconds in an eyepiece with a 60° field.\u003c\/p\u003e\n\u003cp\u003eTurn the scope to M57, the Ring Nebula, and the ring shape is obvious at this power. The central hole is clearly defined. With a 12-inch or larger scope, you can start to detect the slight color tint. M27, the Dumbbell Nebula, shows its apple-core shape with the fainter outer lobes becoming visible on transparent nights.\u003c\/p\u003e\n\u003cp\u003eGlobular clusters are where 139x really delivers. M13 breaks into individual stars well past the core. M3 shows its denser central condensation surrounded by resolved chains and arcs. In a 12-inch scope, the view is spectacular — hundreds of individual stars across the face of the cluster, with the 100° field holding the entire globular in context with the surrounding star field.\u003c\/p\u003e\n\u003cp\u003eOn the Moon, 139x is a comfortable power for touring the terminator. Craters show central peaks, terraced walls, and shadow detail. The major rilles — Vallis Schroteri, Hadley Rille — are visible on sharp nights. You can spend an entire session working along the terminator without the view feeling cramped.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\"Simply stunning.\" This owner tested the 9mm in a 10-inch f\/4.7 Dobsonian at 133x and reported Venus sharp and bright, Betelgeuse showing saturated orange, and M42 filling the 100° field with nebulosity that he called his best Orion Nebula view. The Moon was \"my best ever view\" through this eyepiece. \u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eThe 9mm XWA makes an excellent Barlow companion. Drop it into a quality 2x Barlow and you effectively have a 4.5mm eyepiece with 100° apparent field — extreme magnification for planetary and lunar detail on nights of exceptional seeing. Use the 1.25\" barrel (collar removed) in a 1.25\" Barlow for the most secure connection. This gives you two high-power focal lengths from one eyepiece.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs 13mm eye relief enough for eyeglasses?\u003c\/strong\u003e\u003cbr\u003eIt's usable but tight. Most eyeglass wearers can see about 85–90% of the field with glasses on and the eyecup rolled down. If full-field eyeglass compatibility is critical, the 13mm or 20mm XWAs have 15mm eye relief and are more comfortable with glasses. If you observe without glasses (correcting astigmatism with the focuser), 13mm is not an issue.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does this compare to the Astro-Tech 9mm 82° UWA?\u003c\/strong\u003e\u003cbr\u003eThe 82° UWA is lighter, less expensive, and has a narrower field. The 100° XWA has more glass (9 elements), a wider field, waterproof sealing, and better edge correction at fast focal ratios. If you observe with a fast Dob and want the widest possible field at high power, the XWA is the better choice. For a lighter, simpler eyepiece at a lower price, the 82° UWA is a solid alternative.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat magnification will I get?\u003c\/strong\u003e\u003cbr\u003eDivide your telescope's focal length by 9. Examples: 1250mm Dob = 139x, 1000mm scope = 111x, 714mm refractor = 79x, 500mm short refractor = 56x. The 100° apparent field gives a true field of roughly 100° ÷ magnification.\u003c\/p\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe 9mm is the planetary and detail eyepiece in the XWA line. It delivers the magnification you need for Jupiter's cloud bands, Saturn's rings, and globular cluster resolution, wrapped in a 100° field that gives you real time to observe before the object drifts out. At 17 ounces it's lighter than the wider-field XWAs, and the dual barrel fits any focuser or diagonal in your collection. One owner called it a top-shelf performer in a fast Dob — sharp, contrasty, and easy to use. For the observer who wants high-power views without the narrow-field tunnel effect, this is the eyepiece that delivers.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e100°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Elements\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e9 elements, fully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e13mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.25\" and 2\" (removable 2\" collar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Finish\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eChrome with safety groove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEyecup\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSoft rolldown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — O-ring sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFast Scope Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eDesigned for f\/4 and above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e17 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481994145865,"sku":"ATXWA09","price":279.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/hart0033.jpg?v=1675380212"},{"product_id":"astro-tech-at60edp-60mm-f-5-petzval-ota","title":"Astro-Tech AT60EDP 60mm f\/5 Dual ED Petzval OTA","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eThis Product Has Been Discontinued.  This Page Is Here For Informational Purposes Only.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eMost small refractors ask you to buy a separate field flattener or reducer to get round stars across your imaging chip. Then you spend an evening shimming spacers and measuring back focus before you ever take a single frame. The AT60EDP skips all of that. It's a four-element Petzval astrograph with the field correction built into the optical design — two ED elements (FCD-100 and FK-61) arranged in a Petzval configuration that delivers a flat, corrected 44mm image circle straight out of the focuser. Attach your camera and shoot.\u003c\/p\u003e\n\u003ch3\u003eImaging Only\u003c\/h3\u003e\n\u003cp\u003eThis is not a visual telescope. The Petzval design places its rear element group close to the focal plane, leaving no room for an eyepiece to reach focus. The AT60EDP is built to do one thing — put round, color-free stars on your sensor across a wide field — and it does that with the kind of precision that usually costs considerably more.\u003c\/p\u003e\n\u003ch3\u003eThe Optics\u003c\/h3\u003e\n\u003cp\u003eFour elements in two groups. The front group uses FCD-100 extra-low dispersion glass; the rear group uses FK-61 (FPL-51 equivalent). Together they produce tight, well-corrected star images with virtually no chromatic aberration — owners consistently report clean color even on bright stars. The 300mm focal length at f\/5 gives you wide-field coverage that frames large nebula complexes, the full extent of the Andromeda Galaxy, and sweeping Milky Way star fields. On an APS-C sensor, the field of view runs roughly 2.9° × 1.9°.\u003c\/p\u003e\n\u003ch3\u003eBuilt Like a Tank\u003c\/h3\u003e\n\u003cp\u003eOwners who pick up the AT60EDP for the first time tend to comment on the same thing: it's heavier than it looks. At 6.9 pounds, it has a density and solidity that you don't expect from a 60mm scope. The focuser is a 2.8-inch dual-speed rack-and-pinion with 10:1 fine focus, 1mm scale markings on the drawtube, a lock knob, and a 48mm T-thread output. A built-in 360° rotating camera angle adjuster lets you frame your target without loosening the tube rings. The sliding dew shield extends for use and retracts for transport. A Vixen-style dovetail mounting shoe on the bottom and a handle on top mean you can ride it piggyback on a larger scope or mount it directly on a small tracking mount.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech AT60EDP 60mm f\/5 Dual ED Petzval OTA\u003c\/li\u003e\n\u003cli\u003eTube rings (pair)\u003c\/li\u003e\n\u003cli\u003eVixen-style dovetail bar\u003c\/li\u003e\n\u003cli\u003e360° rotating camera angle adjuster\u003c\/li\u003e\n\u003cli\u003eFinder scope mounting shoe\u003c\/li\u003e\n\u003cli\u003eFront and rear dust covers\u003c\/li\u003e\n\u003cli\u003ePadded carry bag\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-element Petzval optical design\u003c\/strong\u003e — Two ED glass groups (FCD-100 + FK-61) with built-in field flattener. No separate flattener or reducer to buy, space, or align.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e44mm flat image circle\u003c\/strong\u003e — Covers APS-C sensors fully with round stars to the corners. Owners report no vignetting on the ASI2600MC and similar APS-C chips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300mm f\/5 focal length\u003c\/strong\u003e — Wide-field framing for large nebula complexes, galaxy groups, and Milky Way panoramas. Fast enough for reasonable exposure times on faint targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVirtually zero chromatic aberration\u003c\/strong\u003e — The dual-ED design produces clean color on bright stars without the purple halos that plague simpler doublets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.8\" dual-speed rack-and-pinion focuser\u003c\/strong\u003e — 10:1 fine focus ratio, 1mm drawtube scale markings, lock knob, and 48mm T-thread output. Compatible with ZWO and other electronic autofocusers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in 360° camera angle adjuster\u003c\/strong\u003e — Rotate your camera to frame targets without loosening the tube rings or disturbing your polar alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e55mm back focus\u003c\/strong\u003e — Standard DSLR spacing. Dedicated astronomy cameras may need a short spacer to reach the correct distance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiggyback-ready mounting shoe\u003c\/strong\u003e — Vixen dovetail on the bottom, carry handle on top. Mount it on a small tracker or ride it on a larger scope as a widefield companion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSliding dew shield\u003c\/strong\u003e — Extends for observing, retracts to shorten the tube for transport and storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePadded carry bag included\u003c\/strong\u003e — Compact enough for airline carry-on or a gear bag. Reviewers praise it as a capable travel astrograph.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImaging Targets\u003c\/h3\u003e\n\u003cp\u003eAt 300mm and f\/5, the AT60EDP frames wide. On an APS-C sensor, you'll capture the full sweep of the Orion Molecular Cloud with room to spare, the entire Andromeda Galaxy (M31) with its companion galaxies, the Heart and Soul Nebulae side by side, and the North America and Pelican Nebulae in a single frame. For narrowband work, the Veil Nebula complex fits beautifully, and the Cygnus region becomes a mosaic of hydrogen-alpha structure you can capture in single panels rather than multi-frame mosaics. Owners using mono cameras with dual-narrowband and quad-band filters report excellent results — the clean color correction means your filter work shows up without competing against optical artifacts.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\"My chief regret after buying and using an AT60EDP, is not the Petzval design, or the quality of the ED glass, or the wide and flat field of view, or the excellent build quality. It is the price.\"\u003c\/p\u003e\n\u003cp\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/910773-is-there-an-astro-tech-at60edp-petzval-in-your-future\/?do=findComment\u0026amp;comment=13261672\"\u003eCloudy Nights AT60EDP discussion\u003c\/a\u003e. This owner paid full price before the closeout — and was joking that lowering the price was the only thing to complain about.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch3\u003eImaging Tip\u003c\/h3\u003e\n\u003cp\u003eThe AT60EDP's 55mm back focus is designed for standard DSLR spacing (T-ring + camera body). If you're using a dedicated astronomy camera with a filter drawer, measure your imaging train carefully — several owners report needing an 8mm M48 spacer to reach focus with a filter drawer in the optical path. Mark your focuser position with the drawtube scale once you've dialed it in, and you'll hit focus on the first try every session.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this visually with an eyepiece?\u003c\/strong\u003e\u003cbr\u003eNo. The Petzval design places its rear optical group too close to the focal plane for an eyepiece to reach focus. This is a dedicated astrograph — imaging only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a separate field flattener or focal reducer?\u003c\/strong\u003e\u003cbr\u003eNo. The four-element Petzval design has field correction built in. The 44mm image circle is flat from center to edge. This is one of the AT60EDP's key advantages — no extra optics to buy, space, or align.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat cameras work with this scope?\u003c\/strong\u003e\u003cbr\u003eDSLR and mirrorless cameras connect via a T-ring for your specific mount (sold separately). Dedicated CMOS and CCD astronomy cameras typically have 48mm T-threads built in and connect directly without a T-ring. Owners report excellent results with ASI2600MC, ASI2600MM-Pro, ASI533MC Pro, ASI294, Canon 60Da, and Player One Poseidon cameras.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it cover a full-frame sensor?\u003c\/strong\u003e\u003cbr\u003eThe 44mm image circle fully illuminates APS-C sensors. Full-frame sensors (43.3mm diagonal) are right at the edge of the specified image circle. Some owners believe it will cover full frame, but most confirmed results are on APS-C chips. If full-frame edge-to-edge correction is critical, test before committing to long integration times.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount does it need?\u003c\/strong\u003e\u003cbr\u003eAt 6.9 pounds (plus camera), the AT60EDP works well on small tracking mounts — owners report success with the Star Adventurer, Star Explorer 2i, and iOptron SkyGuider Pro. It also piggybacks nicely on a larger scope using the Vixen dovetail mounting shoe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the focuser travel limited with some setups?\u003c\/strong\u003e\u003cbr\u003eThe 55mm back focus assumes a direct camera connection (T-ring + body, or dedicated camera with T-thread). Adding a filter drawer to the imaging train shortens the available spacing. An 8mm M48 spacer, placed between the focuser and the filter drawer, solves this for most configurations.\u003c\/p\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT60EDP was built for imagers who wanted a grab-and-go widefield astrograph without the fuss of spacing a separate flattener or reducer. It delivered on that promise — 17 five-star reviews, round stars to the corners, and owners who stopped shopping for alternatives after using it. It's discontinued now, and the closeout price makes it an even better value than it was at full retail. If you image wide fields and want a scope that's ready to shoot the moment you attach a camera, this is one of the most straightforward imaging setups we've ever carried.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFour-element Petzval (2 groups) with built-in field flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eGlass Types\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFCD-100 (front group) + FK-61 \/ FPL-51 equivalent (rear group)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e60mm (2.36\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ef\/5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eImage Circle\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e44mm (fully illuminated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBack Focus\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e55mm (from rear of focuser to image plane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.78 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e11.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2.8\" dual-speed rack-and-pinion, 10:1 fine focus, 48mm T-thread output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCamera Angle Adjuster\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eBuilt-in 360° rotating CAA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eVixen-style dovetail shoe with carry handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSliding retractable lens shade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight (OTA)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e6.9 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eUse\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eAstrophotography only (not suitable for visual use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCamera Connection\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e48mm T-threads (DSLR\/mirrorless via T-ring; dedicated astro cameras attach directly)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40481995587657,"sku":"AT60EDP","price":600.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT60EDP_1-13417.jpg?v=1714058498"},{"product_id":"astro-tech-9mm-to-27mm-1-25-zoom-eyepiece","title":"Astro-Tech 9mm to 27mm 1.25\" Zoom Eyepiece","description":"\u003cp\u003eYou're at the eyepiece, Jupiter is centered, and you want to push the magnification higher. Normally that means pulling out the eyepiece, fumbling through your case in the dark, dropping the dust cap in the grass, and hoping you can find the planet again once the new eyepiece is seated. The Astro-Tech 9-27mm Zoom skips all of that. Twist the knurled ring and you move smoothly from 27mm down to 9mm — five marked focal lengths, one eyepiece, no hunting for dropped caps in the dew.\u003c\/p\u003e\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eThis is a 1.25\" zoom eyepiece with five  positions at 27mm, 20mm, 15mm, 11mm, and 9mm. At the 27mm setting, you get a 60-degree apparent field of view — wide enough for finding and framing targets. Twist down to 9mm and you're at 40 degrees, tighter but still comfortable for planetary detail. A 7-element, 4-group optical design with full broadband multi-coatings keeps contrast respectable across the zoom range, and blackened lens edges help control scattered light inside the barrel.\u003c\/p\u003e\n\u003cp\u003eThe eye relief stays comfortable throughout the range. A rubber twist-up eyecup lets you adjust the eye position to suit your preference, and eyeglass wearers will find enough clearance to use it without removing their glasses. The chrome barrel is threaded for standard 1.25\" filters, so you can pair it with a moon filter or light pollution filter without any adapter fuss.\u003c\/p\u003e\n\u003ch3\u003eWhere It Fits\u003c\/h3\u003e\n\u003cp\u003eA zoom eyepiece is not a replacement for a full set of premium fixed-focal-length eyepieces, and we won't pretend otherwise. Fixed eyepieces at each focal length will generally deliver wider fields and sharper edge performance. But a zoom has real advantages that fixed eyepieces can't match. You can find an object at low power and zoom in to examine it at high power without ever losing your target. You can dial in the exact magnification where the seeing settles down — not the nearest fixed step, but the precise point where the image snaps. And you can do all of this with one hand, in the dark, without ever opening your eyepiece case.\u003c\/p\u003e\n\u003cp\u003eThat makes the 9-27mm Zoom especially useful for a few situations. For public star parties and outreach events, it means one eyepiece handles every target of the night — the Moon, Saturn's rings, the Orion Nebula — without you hovering over a table of loose eyepieces. For grab-and-go setups where weight and packing matter, it replaces five eyepieces with seven ounces. And for newer observers still learning what magnification works best for different targets, it's an education tool: twist, compare, learn what you like, then invest in individual eyepieces later with real experience behind the decision.\u003c\/p\u003e\n\u003ch3\u003eA Note on Refocusing\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece is not parfocal — when you change the zoom setting, you will need a small touch of the focus knob to sharpen the image. It's a minor adjustment, not a full refocus, and after a few sessions it becomes second nature. Every zoom eyepiece in this price class requires the same thing.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech 9-27mm 1.25\" zoom eyepiece\u003c\/li\u003e\n\u003cli\u003eDust caps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40° to 60° apparent field of view\u003c\/strong\u003e — The 27mm setting gives a generous 60-degree field for finding and framing. The 9mm high-power setting narrows to 40 degrees — tighter, but still a clean circle with no kidney-beaning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7-element, 4-group fully multi-coated optics\u003c\/strong\u003e — Full broadband multi-coatings on all air-to-glass surfaces reduce reflections and maintain contrast, particularly important in a multi-element design where internal scatter can add up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened lens edges\u003c\/strong\u003e — Reduces internal reflections and stray light that could wash out contrast on faint targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" filter threaded barrel\u003c\/strong\u003e — Standard 1.25\" filter threads on the barrel. Moon filters, UHC, O-III — thread them on and they stay put through the entire zoom range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRubber twist-up eyecup\u003c\/strong\u003e — Adjustable for comfortable eye positioning. Folds or twists down for eyeglass wearers; extends up to block stray light for those observing without glasses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and lightweight (~7 oz)\u003c\/strong\u003e — Lighter than most individual premium eyepieces. Fits in a jacket pocket for grab-and-go sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal 1.25\" barrel\u003c\/strong\u003e — Fits any telescope with a 1.25\" focuser or a 2\"-to-1.25\" adapter. Works with refractors, reflectors, and catadioptrics alike.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eUse the zoom to find the sweet spot on a given night. Atmospheric seeing varies — some nights you can push 200× and hold it, other nights 120× is the ceiling. Start at 27mm, center your target, then slowly zoom toward 9mm and watch the image. There's a point where the detail stops improving and the image starts softening. That's your ceiling for tonight. A zoom teaches you to read the atmosphere faster than any fixed eyepiece collection can, because you can test continuously instead of in jumps.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can this replace a full set of eyepieces?\u003c\/strong\u003e\u003cbr\u003eIt can replace a starter set, and for many observers — especially those doing grab-and-go or public outreach — it handles the job all evening. Where it falls short compared to premium fixed eyepieces is edge-of-field sharpness and field width at the shorter focal lengths. If you want the widest possible view at each magnification, individual eyepieces will win. But if you want versatility and convenience in a single barrel, this delivers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does it work with a Barlow?\u003c\/strong\u003e\u003cbr\u003eYes. A 2× Barlow effectively doubles the magnification at each zoom setting, giving you a 4.5mm to 13.5mm range. Be aware that stacking optical elements adds surfaces and can reduce contrast slightly, but for lunar and planetary use it works well.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to refocus when I change the zoom setting?\u003c\/strong\u003e\u003cbr\u003eYes. This eyepiece is not parfocal, so a small adjustment to the focus knob is needed when you twist to a new focal length. It's a quick touch, not a full refocus — once you learn the pattern, it takes a second or two.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this work for eyeglass wearers?\u003c\/strong\u003e\u003cbr\u003eYes. The twist-up eyecup folds down to bring your eye closer to the lens, and the eye relief is comfortable enough for glasses use across the zoom range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a good first eyepiece upgrade?\u003c\/strong\u003e\u003cbr\u003eIt's an excellent one. Most beginner telescopes ship with one or two basic eyepieces, and the zoom immediately expands your range to five focal lengths. More importantly, it teaches you which magnifications you actually prefer for different targets — information you'll use when choosing individual premium eyepieces later.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use filters with this eyepiece?\u003c\/strong\u003e\u003cbr\u003eYes. The barrel is threaded for standard 1.25\" filters. Thread on a moon filter to tame lunar glare, or use a nebula filter for deep-sky observing. The filter stays in place regardless of the zoom setting.\u003c\/p\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe Astro-Tech 9-27mm Zoom is not trying to be the last eyepiece you ever buy. It's trying to be the one you grab when you don't want to carry five. For outreach nights, grab-and-go sessions, travel setups, or a newer observer building real experience before investing in a premium collection — five focal lengths, one barrel, seven ounces. That's a hard argument to beat.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEyepiece Type\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eZoom (variable focal length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length Range\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e9mm – 27mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eMarked Focal Lengths\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e9mm, 11mm, 15mm, 20mm, 27mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e40° (at 9mm) to 60° (at 27mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e18mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e7 elements in 4 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCoatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully broadband multi-coated (all air-to-glass surfaces)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eLens Edge Treatment\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eBlackened\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Finish\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eChrome-plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFilter Threaded\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — standard 1.25\" filter threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEyecup\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eRubber twist-up, adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eParfocal\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eNo — minor refocus required when changing zoom setting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e~7 oz (190g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eIncluded\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eEyepiece, dust cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year manufacturer warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":41403631566921,"sku":"AT927Z","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/image_51bbcc81-612b-4c8b-b8f6-5bc5435ff442.jpg?v=1716202157"},{"product_id":"astro-tech-at150edl-refractor-ota-fcd-100-and-lanthanum-f-8-doublet-with-hard-case","title":"Astro-Tech AT150EDL Refractor OTA FCD-100 and Lanthanum f\/8 Doublet with Hard Case","description":"\u003cp\u003eA six-inch refractor used to mean one of two things: spend big bucks on a premium triplet, or settle for a scope that shows purple halos on every bright star. The AT150EDL is neither. It's a 150mm f\/8 air-spaced doublet made with Ohara FCD-100 extra-low dispersion glass paired with a lanthanum mating element — a glass combination that pushes color correction into territory that was, until recently, reserved for triple-element apochromats at two to three times the price. Dennis di Cicco tested it for Sky \u0026amp; Telescope and called it \"an optically superb telescope.\" He spotted Sirius B — the Pup — at 150× through this doublet. That's a test most refractors twice its price would be proud to pass.\u003c\/p\u003e\n\u003cp\u003eThe AT150EDL exists because of a question we kept hearing: what if you want six inches of clean refractor aperture, and you don't want to mortgage the house to get it? The answer turns out to be a well-designed doublet using the right glass. FCD-100 is Ohara's extra-low dispersion equivalent — the same grade used in high-end camera lenses and observatory instruments. Pair it with lanthanum in an air-spaced cell, optimize the spacing, and you get a scope that delivers virtually no false color at the eyepiece and produces star images that snap into focus with textbook diffraction patterns. We guarantee a minimum 0.95 Strehl ratio. Independent testing on Cloudy Nights measured one sample at approximately 0.99 Strehl in green — essentially diffraction-limited.\u003c\/p\u003e\n\u003cp\u003eBut a refractor is more than its objective. The AT150EDL shares its entire mechanical platform with our flagship AT152EDT triplet — the same 3.2-inch dual-speed rack-and-pinion focuser, the same CNC machined tube rings, the same Losmandy D-plate, the same precision-machined collimatable lens cell. The focuser alone sets this scope apart from anything in its price range. It's a true rack-and-pinion with helical gears, 10:1 fine focusing, 360° rotation on the OTA, and a camera angle adjuster that rotates the entire eyepiece assembly independently. The mechanics are smooth enough that di Cicco noted he didn't feel the need to replace it — a comment he doesn't make about many scopes at any price.\u003c\/p\u003e\n\u003ch3\u003eS\u0026amp;T Tested\u003c\/h3\u003e\n\u003cp\u003eDennis di Cicco reviewed the AT150EDL in the November 2025 issue of Sky \u0026amp; Telescope. His optical bench test using a double-pass autocollimation Ronchi grating showed bands straight across the entire aperture with no sign of zones — confirming the objective is free of spherical aberration and properly mounted without stress. Under the stars on an iOptron CEM120, he found stars snapping into focus at moderately high magnifications, with the sweet spot for focus \"so precise that just a touch of the fine-focus knob moving the eyepiece either inside or outside of focus visibly softened the images.\" He reported no apparent color halos around very bright stars — the only color he saw was atmospheric, not optical.\u003c\/p\u003e\n\u003cp\u003eDi Cicco observed Jupiter at 400× and found the views \"very nice,\" with moments when he could resolve Ganymede as a tiny disk rather than a point of light. He split tight double stars with sharp, high-contrast images that made it easy to distinguish subtle color differences between components. And in one of the review's standout moments, he spotted the eighth-magnitude companion of Sirius at 150× using a Tele Vue 24mm Panoptic and a 3× Barlow — making the AT150EDL one of the smallest apertures from which he's ever glimpsed the Pup.\u003c\/p\u003e\n\u003cp\u003eHis conclusion was direct: when it comes to visual observing, the performance difference between this doublet and a triplet apochromat doesn't justify the typical cost difference. Factor in the excellent mechanicals, and the AT150EDL is, in his words, \"a very sweet deal.\"\u003c\/p\u003e\n\u003ch3\u003eThe Optical Design\u003c\/h3\u003e\n\u003cp\u003eThe objective is a two-element air-spaced doublet using FCD-100 ED glass and a lanthanum crown mating element. Both surfaces are fully multi-coated — all four air-to-glass surfaces — delivering high light transmission and strong contrast. The coatings are effective enough that you'll barely see your reflection when looking down the tube.\u003c\/p\u003e\n\u003cp\u003eInside the OTA, six knife-edge light baffles line the tube and micro baffles run the full length of the focuser drawtube. The objective lens edges are hand-blackened. All of this is designed to eliminate scattered light and maximize contrast — the kind of detail you notice when you're trying to tease out low-contrast planetary detail or split a close double against the glare of a bright primary.\u003c\/p\u003e\n\u003cp\u003eThe lens cell is precision-machined and collimatable — push-pull adjustment screws let you optimize alignment if the scope ever needs it after shipping or years of use. This is a feature usually reserved for triplet APOs at significantly higher price points.\u003c\/p\u003e\n\u003ch3\u003eThe 3.2\" Rack-and-Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eThe focuser is the same unit used on the AT152EDT triplet. It's a true 3.2-inch rack-and-pinion driven by helical gears with adjustable tension. Dual-speed focusing with 10:1 reduction lets you dial in precise focus for both high-power visual work and critical astrophotography. The drawtube has marked increments and provides 150mm of total back focus — enough for virtually any visual or imaging accessory chain you're likely to build.\u003c\/p\u003e\n\u003cp\u003eThe focuser body rotates 360° on the OTA, so you can position the focus knobs wherever your hands naturally fall regardless of where the scope is pointed. The 2-inch eyepiece assembly also rotates 360° via the built-in camera angle adjuster, letting you frame targets or reposition a star diagonal without disturbing focus. Accessories are held by a brass compression ring with three locking thumbscrews — no set screws biting into your eyepiece barrels. A 1.25-inch adapter is included.\u003c\/p\u003e\n\u003cp\u003eThe focuser lock is solid. Once you set focus, it stays — no slop, no shift, no flexure — even with a heavy imaging rig hanging off the back end. If you're coming from a Crayford-style focuser that sags under load, the difference will be immediately obvious.\u003c\/p\u003e\n\u003ch3\u003eBuilt for the Field\u003c\/h3\u003e\n\u003cp\u003eThe OTA weighs 20.5 pounds on its own. Add the CNC machined tube rings, 13-inch Losmandy D-style dovetail plate, and CNC carry handle, and you're at 25 pounds ready to mount. That puts the AT150EDL within the working range of mounts like the iOptron CEM70, Losmandy G11, and even the Celestron CGX. The retractable dew shield keeps the overall length manageable at about 43.5 inches extended — large, but not unwieldy for a six-inch refractor.\u003c\/p\u003e\n\u003cp\u003eThe carry handle doubles as an 18-centimeter Vixen-style mounting bar, and the tube rings have threaded holes on top for attaching accessories — a guidescope, a finderscope bracket, a piggyback camera plate. A Synta-standard finder shoe is already mounted on the focuser.\u003c\/p\u003e\n\u003cp\u003eThe scope ships in a foam-lined hard case with three handles, three locking hasps, and spring-loaded metal corners. The case is robust — Kaizen foam with cutouts for a diagonal, eyepieces, and accessories. It's also substantial: the loaded case tips the scale near 72 pounds. Di Cicco noted the case is really a two-person carry, and owners on Cloudy Nights have confirmed it. If you're setting up solo, plan on making multiple trips from the car rather than trying to carry the whole thing at once.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech AT150EDL 150mm f\/8 OTA with retractable dew shield\u003c\/li\u003e\n\u003cli\u003eCNC machined tube rings (pair) with threaded accessory holes on top\u003c\/li\u003e\n\u003cli\u003e13\" Losmandy D-style dovetail mounting plate\u003c\/li\u003e\n\u003cli\u003eCNC carry handle (doubles as 18cm Vixen-style mounting bar)\u003c\/li\u003e\n\u003cli\u003eSynta-standard finder shoe (mounted on focuser)\u003c\/li\u003e\n\u003cli\u003e1.25\" eyepiece adapter\u003c\/li\u003e\n\u003cli\u003e4\" removable extension section (for additional back focus with binoviewers)\u003c\/li\u003e\n\u003cli\u003eSlip-on metal dust cap\u003c\/li\u003e\n\u003cli\u003eHard-sided foam-lined carry case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e150mm f\/8 FCD-100 and lanthanum air-spaced doublet.\u003c\/strong\u003e Ohara FCD-100 extra-low dispersion glass paired with a lanthanum crown element. Color correction that performs virtually indistinguishably from triplet apochromats at the eyepiece. Fully multi-coated on all four air-to-glass surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReviewed by Sky \u0026amp; Telescope (November 2025).\u003c\/strong\u003e Dennis di Cicco: \"an optically superb telescope.\" Ronchi test showed no zones, no spherical aberration. Observed Sirius B at 150×. Highly recommended.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed minimum 0.95 Strehl ratio.\u003c\/strong\u003e Every AT150EDL is tested before it ships. Independent DPAC analysis on Cloudy Nights measured one unit at approximately 0.99 Strehl in green — essentially at the diffraction limit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollimatable precision-machined lens cell.\u003c\/strong\u003e Push-pull adjustment screws let you optimize optical alignment — a feature typically reserved for premium triplets. Factory collimation has been excellent on units shipped, but the ability to fine-tune is there if you ever need it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.2\" dual-speed rack-and-pinion focuser with 10:1 fine focus.\u003c\/strong\u003e   Adjustable tension, 150mm total back focus, solid lock with no image shift. Not a Crayford — a true geared rack system built to support heavy imaging trains without slop or sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° camera angle adjuster and 360° focuser body rotation.\u003c\/strong\u003e Rotate the eyepiece assembly to frame targets, rotate the focuser body to position the focus knobs comfortably — independent adjustments that make a real difference during long sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix internal knife-edge baffles plus micro baffles in the drawtube.\u003c\/strong\u003e Hand-blackened lens edges. Aggressive stray-light suppression for maximum contrast on planets, the moon, and tight double stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC machined tube rings, Losmandy D-plate, and carry handle included.\u003c\/strong\u003e No aftermarket mounting hardware to buy. The rings have threaded holes on top for accessories. The handle doubles as a Vixen-style mounting bar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4\" removable extension section.\u003c\/strong\u003e Remove it to gain an additional ~100mm of back focus for binoviewers or other accessories that need extra in-focus travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard-sided foam-lined carry case.\u003c\/strong\u003e Kaizen foam with cutouts for accessories. Three handles, three locking hasps, spring-loaded metal corners. Built to protect the investment — though you'll want a friend to help carry it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eA 150mm refractor is a significant step up from the 100–130mm class that most amateur refractor owners are accustomed to. The jump in light grasp is real — 150mm collects 33% more light than a 130mm and more than twice as much as a 100mm. But aperture in a refractor isn't just about brightness. It's about resolution, contrast, and the quality of the diffraction pattern. An unobstructed 150mm aperture delivers clean, contrasty images with textbook Airy disks — no central obstruction to scatter light into the rings and soften planetary detail.\u003c\/p\u003e\n\u003cp\u003eOn the planets, the AT150EDL will show detail that smaller refractors hint at but can't quite resolve. Jupiter's belts will show festoons, barges, and the subtle gradations inside the equatorial bands. Saturn's Cassini Division will be a clean, dark line all the way around the rings, and on steady nights you'll start to see belt structure on the disk. Mars near opposition will show dark albedo markings with good definition. The Moon is where a six-inch refractor truly excels — the terminator will show craterlets inside crater floors, rilles threading across the maria, and shadow detail that makes you forget you're looking through an eyepiece.\u003c\/p\u003e\n\u003cp\u003eFor double stars, 150mm gives you a theoretical resolution of about 0.77 arc-seconds. You'll split close pairs that are beyond the reach of four-inch scopes, and the high-contrast, color-free images make it easy to detect subtle color differences between components — one of the true pleasures of double-star observing in a quality refractor.\u003c\/p\u003e\n\u003cp\u003eDeep-sky performance at f\/8 favors targets that reward contrast and resolution over raw light-gathering: globular clusters where you can begin to resolve individual stars across the face, planetary nebulae with crisp edges and detectable color, and open clusters that sparkle with clean pinpoint stars. Under dark skies, you'll see more structure in galaxies like M51 and M81\/M82 than a smaller refractor can deliver, and the contrast advantage of the unobstructed aperture will be evident on targets like the Veil Nebula with an OIII filter.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003e\"I couldn't resist and hauled it out despite the 22°F weather and high clouds. And despite the crappy, icy seeing I caught some glimpses of Jupiter and the moon with a pair of 19mm Panoptics. I'm very impressed. It's going to kill on a clear night. I can tell it has so much more in the tank.\"\u003c\/em\u003e\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/943247-pulled-the-trigger-on-an-at150edl\/?do=findComment\u0026amp;comment=13848804\"\u003eCloudy Nights AT150EDL Owners Thread\u003c\/a\u003e. This owner set up the scope on a G-11 for first light in freezing conditions and immediately recognized the optical quality despite poor seeing.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\"I had it out with my pops last night for first light. Seeing was terrible and the moon annoying, but the views of Jupiter through this thing were amazing. We watched the GRS traverse the disk and saw festoons in the belts.\"\u003c\/em\u003e\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/943247-pulled-the-trigger-on-an-at150edl\/?do=findComment\u0026amp;comment=13852713\"\u003eCloudy Nights AT150EDL Owners Thread\u003c\/a\u003e. This owner observed Jupiter on first light from Hawaii and saw detail in the belts even through poor seeing.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eA 150mm f\/8 refractor likes a steady mount and a bit of patience. Give it at least 30 minutes to reach thermal equilibrium — the doublet objective is thick glass, and it'll reward you for letting it cool. Start at moderate power (120–150×) and work up. On the best nights, the AT150EDL will take 300× and higher on planets. Use the 10:1 fine focus — at high magnification, the difference between sharp and soft is a hair's width on the focus knob. And don't neglect the focuser rotation: position the knobs where your hand naturally falls before you start observing. Small setup details add up over a long session.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the AT150EDL compare to a triplet APO like the AT152EDT?\u003c\/strong\u003e\u003cbr\u003eThe AT152EDT uses a three-element FCD-100 objective and costs significantly more. Both scopes share the same mechanical platform — focuser, tube rings, dovetail, case. The optical difference is subtle: a well-made doublet at f\/8 corrects color extremely well, and the Sky \u0026amp; Telescope reviewer concluded that for visual observing, the performance gap doesn't justify the price gap. For narrowband imaging, the triplet may have a slight edge. For visual and broadband imaging, the AT150EDL delivers performance that you'd have to look very carefully to distinguish from the triplet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003eThe OTA plus accessories weighs about 25 pounds. You'll want a mount rated for at least 35–40 pounds to account for the moment arm of a 43-inch tube. Mounts that owners are using successfully include the iOptron CEM70 and CEM120, Losmandy G11 (with appropriate counterweights), Losmandy GM-8 (marginal — works but limited), Celestron CGX, and the AZ100 for alt-az visual work. Di Cicco tested on a CEM120. For imaging, err on the side of a heavier mount — the 1200mm focal length magnifies any tracking or stability issues.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use a binoviewer with this scope?\u003c\/strong\u003e\u003cbr\u003eYes. The 4-inch removable extension section behind the focuser gives you additional back focus for binoviewers. Owners on Cloudy Nights have confirmed that Baader MaxBright IIs reach focus with the 1.7× GPC using the stock 2-inch visual back. If you need even more back focus, removing the extension gains approximately 100mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the scope come with a finder or eyepieces?\u003c\/strong\u003e\u003cbr\u003eNo. The AT150EDL ships as an OTA with rings, dovetail, handle, case, and finder shoe — but no finder and no eyepieces. A Synta-standard finder shoe is installed on the focuser, so any Synta-compatible finder (including the Astro-Tech illuminated reticle finder) will drop right in. For eyepieces, at 1200mm focal length, consider a 20–24mm wide-field for low power, a 10–13mm for medium, and a 5–7mm for high power planetary work.\u003c\/p\u003e\n\u003ch3\u003eOptional Accessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 2\" 99% Reflectivity Dielectric Mirror Diagonal:\u003c\/strong\u003e A quality diagonal is essential for a scope at this level. The dielectric coating delivers near-total reflectivity — you won't lose light to the diagonal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech Illuminated Multiple Reticle Finder:\u003c\/strong\u003e Drops directly into the Synta-standard shoe on the focuser. Illuminated crosshairs with multiple reticle patterns for star-hopping and alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 13mm 100° Field Waterproof Eyepiece:\u003c\/strong\u003e At 1200mm focal length, the 13mm delivers 92× with a full 100° apparent field — a stunning walk-through-space view of deep-sky targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 4.8mm 110° Field Waterproof Eyepiece:\u003c\/strong\u003e Your high-power planetary eyepiece. 250× at f\/8 with a 110° apparent field. On nights when the seeing cooperates, this is where the AT150EDL shows what it can do.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT150EDL is for the observer or imager who wants six inches of clean refractor aperture and has been watching the triplet prices and thinking: there has to be another way. There is. The FCD-100 and lanthanum doublet at f\/8 delivers color correction that Sky \u0026amp; Telescope couldn't distinguish from triplet performance at the eyepiece. The mechanicals — focuser, rings, dovetail, collimatable cell — are shared with the AT152EDT triplet and are genuinely premium. The hard case, while heavy, protects the investment. Owners on Cloudy Nights have put 315 posts into the main owners thread and the consensus is clear: this scope punches well above its price. If you've been dreaming about a big refractor and assumed it was out of reach, the AT150EDL is the scope that changes that math.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e150mm (5.9\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eAir-spaced ED doublet (FCD-100 + lanthanum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully multi-coated (all air-to-glass surfaces)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eStrehl Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eGuaranteed minimum 0.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eLens Cell\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ePrecision-machined, collimatable (push-pull adjustment)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eInternal Baffles\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e6 knife-edge baffles + micro baffles in focuser drawtube; hand-blackened lens edges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser Type\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e3.2\" dual-speed rack-and-pinion \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFine Focus Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e10:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTotal Back Focus\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser Rotation\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e360° body rotation on OTA + 360° camera angle adjuster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAccessory Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2\" and 1.25\" compression ring (brass); includes 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser Lock\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSolid focuser lock (no image shift)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eRetractable, 170mm diameter, extends 22cm beyond objective\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Finish\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ePearl-white paint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOverall Length (dew shield extended)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e~43.5\" (1105mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOTA Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e20.5 lbs (9.3 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTotal Weight (with rings, dovetail, handle)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e25.05 lbs (11.4 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eMounting System\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eCNC machined tube rings + 13\" Losmandy D-style dovetail plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCarry Handle\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eCNC machined (doubles as 18cm Vixen-style mounting bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFinder Shoe\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSynta-standard (on focuser)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eStorage Case\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eHard-sided, foam-lined, 3 handles, 3 locking hasps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eShipping Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e72 lbs (33 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":41465461473353,"sku":"AT150EDL","price":2995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT150EDL_1-9414.jpg?v=1731697867"},{"product_id":"astro-tech-21mm-uwa-82-2-eyepiece","title":"Astro-Tech 21mm UWA 82° 2\" Eyepiece","description":"\u003cp\u003eYou spend half the night swapping eyepieces. A 28mm wide-field for the big nebulae, a 16mm for the tight clusters, and something in between that you never quite found — an eyepiece that gives you a real wide-field view at a magnification high enough to pull detail out of deep sky objects without drowning in exit pupil. The Astro-Tech 21mm UWA 82° was designed to fill that gap.\u003c\/p\u003e\n\u003cp\u003eAt 21mm in an f\/7 refractor, you're working with a 3mm exit pupil — dark enough to boost contrast on faint nebulosity, bright enough that the sky background stays smooth. The 82° apparent field gives you roughly 1.7 degrees of true field at that magnification, which is enough to frame the entire Veil Nebula complex or the full sweep of the Double Cluster with room to spare. In an f\/5 Dobsonian, you're at higher power with a tighter exit pupil, and the eyepiece becomes a serious planetary nebula and globular cluster tool.\u003c\/p\u003e\n\u003cp\u003eThe optical design uses six elements in four groups — low-dispersion glass, high-refractive-index elements, and full multicoatings on every air-to-glass surface. The lens edges are blackened to kill internal reflections. The result is a clean, high-contrast image with excellent color correction across the field. And unlike some 82° designs that compromise sharpness at the edges, the 21mm UWA delivers a remarkably flat field — Cloudy Nights reviewers have called it the sharpest edge-to-edge performer in the AT UWA series.\u003c\/p\u003e\n\u003cp\u003eOne honest note on the eye relief: at 14mm, it's comfortable for most observers without glasses. But if you wear eyeglasses, you won't see the entire 82° field. The fold-down rubber eyecup helps you get close, and the moderate eye placement prevents kidney-beaning and blackouts. Non-glasses wearers generally find it natural and easy — just fold the cup down and look.\u003c\/p\u003e\n\u003cp\u003eThe 21mm weighs 14.1 ounces, which is nearly ten ounces lighter than the 28mm UWA. It's a 2\" barrel eyepiece, built from anodized aluminum with a clean black-and-silver finish. It ships with dust caps for both ends and is parfocal with the rest of the AT UWA 82° series — swap from the 28mm to the 21mm to the 16mm without refocusing.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Tech 21mm UWA 82° 2\" eyepiece\u003c\/li\u003e\n\u003cli\u003eSoft fold-down rubber eyecup\u003c\/li\u003e\n\u003cli\u003eDust cap — eye end\u003c\/li\u003e\n\u003cli\u003eDust cap — barrel end\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\"I was surprised to see the stars in the 21mm were sharp all the way to the field edge in my AT102EDL f\/7 refractor. The view was flat like a 30mm UFF eyepiece, but with a wider AFOV and shorter eye relief.\"\u003c\/strong\u003e\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/968136-astro-tech-21mm-uwa-82-reviews-specs-pics-observation-reports\/?do=findComment\u0026amp;comment=14192928\"\u003eCloudy Nights AT 21mm UWA discussion\u003c\/a\u003e. This owner compared it directly to the 28mm UWA, 16mm UWA, and 24mm ES 68° over an entire night and found the 21mm was the only eyepiece consistently sharp to the field edge.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\"To call the field flat is an understatement. Eye relief is fine for me but many will find it to be rather sparse.\"\u003c\/strong\u003e\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/968136-astro-tech-21mm-uwa-82-reviews-specs-pics-observation-reports\/?do=findComment\u0026amp;comment=14203261\"\u003eCloudy Nights AT 21mm UWA discussion\u003c\/a\u003e. This owner conducted drift tests confirming the manufacturer's 1.7° true field spec and resolved the tight double star Porrima right up to the field stop at 48x in a 1000mm refractor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\"In better seeing, the 21 UWA and the 20 T5 Nagler felt more similar than different.\"\u003c\/strong\u003e\u003cbr\u003e— \u003ca href=\"https:\/\/www.cloudynights.com\/forums\/topic\/968136-astro-tech-21mm-uwa-82-reviews-specs-pics-observation-reports\/?do=findComment\u0026amp;comment=14490999\"\u003eCloudy Nights AT 21mm UWA discussion\u003c\/a\u003e. This owner tested the 21mm UWA against a Nagler T5 20mm, an Axiom LX 23mm, and a Pentax XW 23mm in a 16\" f\/4.5 Dob with a Paracorr 2, and found only minor astigmatism in the outer 10% of the field — comparable to the Nagler.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e82° apparent field of view.\u003c\/strong\u003e Wide enough that you lose the \"looking down a tube\" feeling of a 50° Plössl, without the weight and cost of a 100° design. The 82° sweet spot gives you a full-immersion view where star patterns match your charts and your eye can relax into averted vision naturally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-element, four-group optical design.\u003c\/strong\u003e Low-dispersion and high-refractive-index glass with full multicoatings on all air-to-glass surfaces. Blackened lens edges suppress internal scatter. The result is high contrast and flat-field sharpness from center to edge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3mm exit pupil in an f\/7 scope.\u003c\/strong\u003e The 21mm focal length hits a practical sweet spot for deep sky work in refractors and longer-focal-length Newtonians. High enough magnification to darken the sky background and boost contrast on faint objects, low enough to keep the field bright and the image smooth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e14.1-ounce weight.\u003c\/strong\u003e Nearly ten ounces lighter than the 28mm UWA. Light enough that it won't throw off the balance on a small refractor or stress a compression ring fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal with the AT UWA 82° series.\u003c\/strong\u003e Swap between the 28mm, 21mm, 16mm, 13mm, and 10mm without refocusing. Build a matched set that lets you change magnification without losing your target.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" barrel with undercut.\u003c\/strong\u003e Locks securely into any standard 2\" focuser with a compression ring or thumbscrew. The wider barrel eliminates the vignetting you'd get from a 1.25\" barrel at this field of view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFold-down rubber eyecup.\u003c\/strong\u003e Fold it up for glasses wearers who want to get as close as possible, or fold it down for a natural eye position without glasses. Soft rubber that won't scratch your lenses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eIn an 8\" f\/6 Dobsonian (1200mm focal length), the 21mm UWA puts you at 57x with a 1.4° true field. That's a solid deep sky magnification: the Double Cluster fills the view beautifully with both NGC 869 and NGC 884 resolved into individual stars against a dark background. M13 shows its granular core and the outer chains of stars fanning outward. The Dumbbell Nebula (M27) pops against the sky background with its apple-core shape clearly defined.\u003c\/p\u003e\n\u003cp\u003eMove to a 10\" f\/5 Dob and you're at 63x with a 1.3° field. Now the Orion Nebula (M42) fills the view with the Trapezium cluster sharp at center and the nebulosity streaming outward to the field edges. The Lagoon Nebula (M8) shows its dark lane cutting through the bright emission regions. NGC 7000, the North America Nebula, starts to reveal its shape under dark skies — the 21mm's contrast and wide field are exactly what that object needs.\u003c\/p\u003e\n\u003cp\u003eIn a 4\" f\/7 refractor — the scope the AT UWA series was tested in most extensively on Cloudy Nights — you're at 34x with a 2.4° true field. That's a proper rich-field setup: the Pleiades fit comfortably in the field with the faint reflection nebulosity around the brighter stars visible on a transparent night. Sweep through Cygnus and you'll catch the entire Veil Nebula arc in a single field of view with an OIII filter.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eThe 21mm UWA's 3mm exit pupil in an f\/7 refractor is ideal for hunting faint nebulae and planetary nebulae against a darkened sky background. But here's a trick: pair it with an OIII or UHC narrowband filter for emission nebula work. The 82° field means you're scanning less and seeing more in each field of view, and the high contrast of the eyepiece plays well with the filter's narrowband pass. The North America Nebula, the Veil complex, and the Rosette Nebula all benefit enormously from this combination. The 2\" barrel means your filter threads right onto the eyepiece — no adapter needed.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this eyepiece with glasses on?\u003c\/strong\u003e\u003cbr\u003eThe 14mm eye relief is comfortable without glasses, but eyeglass wearers will not see the full 82° field. You'll see most of it — probably 70° or so — but the extreme edges will be vignetted. If full-field viewing with glasses is a priority, consider the 28mm UWA, which has 15mm of eye relief in a slightly more forgiving eye position, or look at the AT UFF series, which offers longer eye relief at the cost of a narrower apparent field.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 21mm compare to the 28mm UWA?\u003c\/strong\u003e\u003cbr\u003eSame optical family, different jobs. The 28mm is your widest-field, lowest-power eyepiece — maximum true field, maximum exit pupil, the big-sweep view. The 21mm steps up the magnification and darkens the sky background for higher-contrast deep sky views. It's almost ten ounces lighter than the 28mm and produces a flatter field edge-to-edge, likely because the optical design was refined after the rest of the UWA series. Think of the 28mm as your finder-chart view and the 21mm as your \"now let's look closer\" view.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this eyepiece sharp at the edges in fast scopes?\u003c\/strong\u003e\u003cbr\u003eIn f\/7 and slower scopes, the 21mm UWA is exceptionally sharp to the edge — multiple Cloudy Nights reviewers have noted it's the best edge performer in the AT UWA series. In f\/5 to f\/6 scopes, you may see some field curvature or slight softening at the extreme edge, which is normal for an 82° eyepiece at those speeds. In a fast Dob (f\/4 to f\/5), a coma corrector like a Paracorr helps, and users report results comparable to a Nagler T5 in that configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the true field of view in my scope?\u003c\/strong\u003e\u003cbr\u003eDivide your telescope's focal length into 21mm to get the magnification, then divide 82° by that magnification to get an approximate true field. For example: 1000mm focal length → 48x → 1.7° true field. A 1200mm SCT → 57x → 1.4°. A 714mm f\/7 refractor → 34x → 2.4°. The manufacturer's spec has been independently confirmed by drift tests.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this eyepiece parfocal with the other AT UWAs?\u003c\/strong\u003e\u003cbr\u003eYes. It's designed to be parfocal across the AT UWA 82° series (28mm, 21mm, 16mm, 13mm, 10mm, 7mm, 4mm). You can swap eyepieces without refocusing, which keeps your target centered and speeds up your observing.\u003c\/p\u003e\n\u003ch3\u003eAccessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 28mm UWA 82° 2\" Eyepiece:\u003c\/strong\u003e The wide-field companion. Use the 28mm for maximum true field and the 21mm when you need more magnification and contrast. Together they cover the low-to-medium power range in any 2\" focuser.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 16mm UWA 82° 1.25\" Eyepiece:\u003c\/strong\u003e Step up from the 21mm when you need tighter framing on smaller objects. Parfocal with the 21mm, so you swap without refocusing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCelestron LensPen Optics Cleaning Tool:\u003c\/strong\u003e The best way to clean an eyepiece lens in the field. Retractable brush on one end, carbon cleaning pad on the other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" UHC or OIII Narrowband Filter:\u003c\/strong\u003e Thread onto the 21mm's 2\" barrel for emission nebula work. The wide field and high contrast of the 21mm UWA are ideal partners for narrowband filtering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT UWA 82° series has been one of the quiet success stories in affordable wide-field eyepieces — solid performers that don't pretend to be Naglers but deliver a lot more than their price would suggest. The 21mm is the newest addition to the line, and it may be the best one yet. The flat-field performance that Cloudy Nights reviewers keep pointing to — sharp stars to the edge in an f\/7 refractor, competitive with a Nagler T5 in a fast Dob — suggests the optical design genuinely improved between the original series and this release. If you're building an AT UWA set for deep sky work, this is the eyepiece that fills the gap between the 28mm's big-sweep view and the 16mm's tighter framing. If you just want one wide-field 2\" eyepiece that balances magnification, contrast, true field, and weight, the 21mm is a very strong place to start.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e21mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e82°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBarrel Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2\" (50.8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEye Relief\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e14mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e6 elements in 4 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCoatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully multicoated (all air-to-glass surfaces)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e14.1 oz (~400g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEyecup\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eSoft fold-down rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWaterproof\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — nitrogen-purged, O-ring sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eParfocal\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eYes — within the AT UWA 82° series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eAnodized aluminum, blackened lens edges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":41515796922441,"sku":"ATUWA21","price":191.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/21mmUWA82_Eyepiece1-9702.jpg?v=1731952281"},{"product_id":"astro-tech-at90edx-f-6-triplet-apo-refractor-ota","title":"Astro-Tech AT90EDX f\/6 Triplet APO Refractor OTA","description":"\u003cp\u003eThe first thing you notice about the AT90EDX is how quiet the view is. No color fringing on bright limbs. No softening at the edge. Just the object — clean, still, and sharp in a way that makes you stop adjusting and start looking. There's a moment, the first time you point a scope like this at Saturn or a tight double star, where you forget you're looking through a 90mm refractor. You're just looking at the thing itself.\u003c\/p\u003e\n\u003cp\u003eThat's what happens when you put FCD-100 glass in a triplet design with a guaranteed .95 Strehl ratio or higher, wrap it in a tube that weighs 12 lbs with the rings on, and hand it to someone who's spent years wondering whether a smaller scope could actually deliver. The AT90EDX isn't trying to replace a 130mm APO. It's trying to be the scope you actually bring outside on a Tuesday night — the one that's set up and cooled down while you're still thinking about whether to haul the big rig out of the closet. And once it's out there, it shows you things that make you glad you didn't stay inside.\u003c\/p\u003e\n\u003ch3\u003eThe Design\u003c\/h3\u003e\n\u003cp\u003eThe AT90EDX is a continuation of a design that started with Thomas Back. Tom laid the foundation for this scope when he created the TMB-92 Signature Series — a 92mm f\/5.5 triplet that became one of the most respected small APOs ever made. When we discontinued the AT92 (our version of Tom's design), the optical prescription sat in the vault for years. We sent it to Roger Ceragioli, who studied the design, updated it to take advantage of current glass and coatings, and made changes to extract everything the 90mm aperture could give. \u003c\/p\u003e\n\u003cp\u003eEvery AT90EDX is tested on an interferometer at the factory and guaranteed to meet or exceed a .95 Strehl ratio. That's not a marketing claim — it's a specification. The test reports go to us, and we keep them on file. The Strehl measurement is taken at 550nm (green), which is where the human eye is most sensitive and where optical quality matters most for visual observing.\u003c\/p\u003e\n\u003ch3\u003eThe Focuser\u003c\/h3\u003e\n\u003cp\u003eThe AT90EDX uses the same 3.2\" dual-speed rotating rack and pinion focuser we put on the AT115EDT and AT130EDT — the larger version with the wider inner diameter. The 3.2\" bore means the full light cone from a 90mm f\/6 objective passes through without contacting the focuser walls, even with the drawtube fully racked in. No vignetting, no clipping, no compromise. The focuser has two coarse knobs and a concentric fine-focus knob with a 10:1 reduction ratio for precise image control at high magnification. All knobs are ribbed for use with gloves.\u003c\/p\u003e\n\u003cp\u003eThe focuser rotates — a built-in Camera Angle Adjuster lets you frame your target without loosening the camera or disturbing focus. For imagers, that's one less adapter in the chain and one less source of tilt. For visual observers, it means your diagonal and eyepiece stay where you want them as the scope tracks across the sky.\u003c\/p\u003e\n\u003cp\u003eThe drawtube ends in a 2\" compression ring holder — non-marring twist lock, not a thumbscrew. A 1.25\" adapter with its own compression ring holder slips into the 2\" fitting. Both hold accessories firmly without scratching barrels.\u003c\/p\u003e\n\u003ch3\u003eThe Tube\u003c\/h3\u003e\n\u003cp\u003eThe OTA is aluminum with our grey anodize finish. At 17.5\" long with the dew shield retracted — 20.2\" extended — it's short enough to ride in a carry-on or tuck into a corner of the car. The retractable dew shield doubles as a lens shade, blocking stray light from streetlamps and neighbors' porch lights. Inside the tube and focuser, knife-edge baffles kill internal reflections. The edges of the objective lens are blackened. These are details that show up as contrast — the difference between a faint galaxy that's \"maybe there\" and one that's clearly there.\u003c\/p\u003e\n\u003cp\u003eThe tube rides in hinged CNC tube rings with a carry handle and a Losmandy-style dovetail plate. Two Vixen finder shoes are installed on the focuser body. A padded soft case with carry handle, shoulder strap, and five cutout compartments is included — room for the scope, a diagonal, and a reducer or flattener.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAT90EDX optical tube assembly\u003c\/li\u003e\n\u003cli\u003e3.2\" dual-speed rotating rack and pinion focuser with Camera Angle Adjuster\u003c\/li\u003e\n\u003cli\u003e2\" compression ring eyepiece holder\u003c\/li\u003e\n\u003cli\u003e1.25\" compression ring eyepiece holder adapter\u003c\/li\u003e\n\u003cli\u003eHinged CNC tube rings with carry handle\u003c\/li\u003e\n\u003cli\u003eLosmandy-style dovetail plate\u003c\/li\u003e\n\u003cli\u003eTwo Vixen-style finder shoes (installed on focuser body)\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield\u003c\/li\u003e\n\u003cli\u003eSlip-on metal dust cap\u003c\/li\u003e\n\u003cli\u003ePadded soft case with carry handle and shoulder strap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e90mm f\/6 FCD-100 triplet apochromat.\u003c\/strong\u003e 540mm focal length. The FCD-100 center element eliminates chromatic aberration — no purple fringing on bright stars, no false color on planetary limbs. Views are clean and color-free in a way that ED doublets at this aperture cannot match.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed .95 Strehl ratio or higher.\u003c\/strong\u003e Every scope is interferometer-tested at the factory. The guarantee means you're getting optics that perform at or near the diffraction limit — not a hope, a specification. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.2\" dual-speed rotating rack and pinion focuser.\u003c\/strong\u003e The wider bore eliminates vignetting across the full light cone. 10:1 fine focus for precise control at high magnification. Built-in Camera Angle Adjuster rotates your imaging train without disturbing focus. Ribbed knobs for glove use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17.5\" retracted length.\u003c\/strong\u003e Dew shield slides back to make the scope short enough for airline carry-on or compact car storage. 20.2\" with dew shield extended. This is a genuinely portable telescope that doesn't ask you to sacrifice optical quality for size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTMB heritage design.\u003c\/strong\u003e Thomas Back laid the foundation with the TMB-92 Signature Series. Roger Ceragioli refined the design for current glass and coatings. The result performs at the level of the original — and, by some accounts, better.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12.2 lbs with rings and handle.\u003c\/strong\u003e Light enough for an alt-az mount, a photo tripod with a fluid head, or a small equatorial. Heavy enough that the machining and build quality are obvious the moment you pick it up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnife-edge internal baffles.\u003c\/strong\u003e In the tube and focuser. Combined with blackened lens edges and fully multicoated optics, they deliver the contrast that makes faint objects visible and planetary detail sharp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-marring compression ring holders.\u003c\/strong\u003e 2\" and 1.25\" twist-lock compression rings hold diagonals, eyepieces, and cameras firmly without scratching barrels. No thumbscrews to leave marks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated imaging accessories available.\u003c\/strong\u003e A 1× field flattener and a 0.8× reducer\/field flattener are both designed specifically for this scope. The reducer drops focal length to 432mm at f\/4.8 for faster widefield imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eNinety millimeters isn't a lot of aperture. It's enough. And when the optics are this good, \"enough\" goes further than most people expect.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMoon:\u003c\/strong\u003e This is where the AT90EDX first earns your trust. At 135× (4mm eyepiece), the terminator is a landscape — not a feature list. Crater walls cast shadows that look three-dimensional. The Alpine Valley rille shows in steady air. Clavius reveals the chain of craterlets across its floor. The Straight Wall is a knife edge. Push to 180× or 216× on a good night and you'll see detail in the lunar highlands that you'd swear requires more aperture. It doesn't. It requires good optics, and these are good optics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlanets:\u003c\/strong\u003e Saturn's Cassini Division is easy. You'll see two or three cloud bands on the globe and the shadow of the rings where they cross the disk. Jupiter shows multiple belts, the Great Red Spot when the geometry is right, and festoons between the belts in steady seeing. The Galilean moons resolve from points to tiny discs at 200×+. Mars at opposition shows the polar cap and dark surface markings — Syrtis Major, Acidalia Planitia — though a 90mm scope will always leave you wanting more Mars. That's true of any scope under about 8 inches.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDouble stars:\u003c\/strong\u003e The Dawes limit for 90mm is about 1.3 arc seconds. Epsilon Lyrae — the Double Double — splits cleanly into four components. Albireo is a gold-and-blue showpiece. Zeta Herculis, a tight pair that challenges small scopes, has been split with this scope (and the position angle confirmed) by at least one CN observer. The color fidelity of the triplet design makes colored doubles — Albireo, Almach, Ras Algethi — look vivid in a way that scopes with residual chromatic aberration cannot match.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDeep sky:\u003c\/strong\u003e From a dark site, M13 begins to resolve into individual stars at 135× and above. M42 shows the Trapezium clearly split with surrounding nebulosity and structure in the bright inner regions. M57 is a visible ring, not just a smudge. The Double Cluster in Perseus fills a low-power field with hundreds of resolved stars. M31's core is bright with hints of the dust lanes from a dark location. Galaxy hunting is limited by aperture — you'll see the Messier galaxies and brighter NGCs, but the AT90EDX is not a faint-galaxy scope. What it shows, though, it shows cleanly. No scatter, no flare, no false color muddying the view.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003eCloudy Nights observers on the AT90EDX:\u003c\/p\u003e\n\u003cp\u003e\"I don't think the views I saw in that AT90EDX could have been improved had a copy of the Test Report had been included.\"\u003c\/p\u003e\n\u003cp\u003e\"I have to tell you, honestly, that this 3.2\" focuser that Astro-Tech has provided on several of the current ED refractors, including the newest editions of the AT115EDT and AT130EDT and the EDQ models, is my all-time favorite.\"\u003c\/p\u003e\n\u003cp\u003e\"Having had the AT90CFT (same optics as the EDX version, lighter build) now for going on two years, I would heartily recommend the AT90EDX from Astronomics. They are truly wonderful scopes... Simply put, mine is the best optics I've ever had. Looking through it I just see perfection!\"\u003c\/p\u003e\n\u003cp\u003e\"Oh and please try looking through it someday, they are amazing visual instruments.\"\u003c\/p\u003e\n\u003cp\u003e\"I had the newest generation Stowaway prior to this scope and optically this AT90CFT is every bit as good.\"\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eA 90mm f\/6 scope cools down fast — fifteen minutes in most conditions, maybe twenty in winter. But \"fast\" is not \"instant,\" and the difference between thermal equilibrium and almost-there shows up as soft, restless star images that can fool you into thinking the seeing is bad or the optics aren't sharp. Give it the full cool-down before you judge anything. If you're star-testing, wait until the intrafocal and extrafocal diffraction patterns are symmetrical and steady. When they are, you'll know the scope is ready — and you'll know why people say this design traces back to Tom Back.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs FCD-100 the same as FPL-53?\u003c\/strong\u003e\u003cbr\u003eNot exactly, but close. FCD-100 is Hoya's designation; FPL-53 is Ohara's. Both are high-dispersion ED glasses with very similar optical properties. In practice, the chromatic correction and Strehl performance from either glass, when properly figured, are indistinguishable. What matters is the design, the execution, and the testing — not the brand stamped on the glass blank.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I image with this scope?\u003c\/strong\u003e\u003cbr\u003eYes — and there are two dedicated accessories for it. The 1× field flattener corrects field curvature for flat stars across the sensor at the native 540mm f\/6. The 0.8× reducer\/field flattener drops the focal length to 432mm at f\/4.8 for faster widefield imaging. Both are designed specifically for the AT90EDX\/AT90CFT optical path. The 3.2\" focuser and Camera Angle Adjuster are built with imaging in mind.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount does this need?\u003c\/strong\u003e\u003cbr\u003eFor visual, any sturdy alt-az mount rated for 15+ lbs works well. A good photo tripod with a fluid head (like the Manfrotto 546B, which at least one owner uses) is a viable option for grab-and-go. For imaging, a small equatorial mount — iOptron CEM26, ZWO AM3, Sky-Watcher HEQ5 class — handles the 12-lb payload easily. The Losmandy dovetail plate fits any Losmandy-style saddle.\u003c\/p\u003e\n\u003ch3\u003eAccessories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 1× Field Flattener for AT90.\u003c\/strong\u003e Corrects field curvature at the native 540mm f\/6 for flat stars across the sensor. Essential for imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 0.8× Reducer\/Field Flattener for AT90CFT\/AT90EDX.\u003c\/strong\u003e Reduces to 432mm at f\/4.8 — faster imaging, wider field of view, flat field correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 2\" 99% Dielectric Mirror Diagonal.\u003c\/strong\u003e Pairs naturally with the 2\" compression ring holder. Dielectric mirror coating delivers near-total reflectivity with zero chromatic shift — important in a scope this color-free.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 20mm 100° XWA 2\" Eyepiece.\u003c\/strong\u003e 27× at f\/6, 4.3° true field. A grab-and-go widefield eyepiece for sweeping the Milky Way.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstro-Tech 9mm 100° Waterproof 1.25\"\/2\" Eyepiece.\u003c\/strong\u003e 60× — a versatile medium-power eyepiece for open clusters, bright nebulae, and galaxy cores.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT90EDX exists because Thomas Back designed a 92mm triplet that people still talk about twenty years later, and because Roger Ceragioli thought it could be made better with modern glass. It exists because a 90mm f\/6 APO with a .95 Strehl guarantee, a 3.2\" focuser, and a retractable dew shield that fits in a soft case is the scope a lot of experienced observers have been waiting for — the one that goes from closet to sky in five minutes and shows them what they expected to see only through their 130. It won't replace a bigger scope for deep-sky work. It will replace the excuses for not going outside. And at the eyepiece, on the nights when the seeing cooperates, it will show you views that make you forget the aperture.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eAstro-Tech AT90EDX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eApochromatic triplet refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e90mm (3.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e540mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eED Glass\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eHoya FCD-100 (center element)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eStrehl Guarantee\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e≥0.95 (interferometer tested at factory)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCoatings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eFully multicoated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e3.2\" dual-speed rotating rack \u0026amp; pinion, 10:1 fine focus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCamera Angle Adjuster\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eBuilt in (focuser rotation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eEyepiece Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e2\" and 1.25\" compression ring (non-marring twist lock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eBack Focus\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e138mm (measured by owner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Construction\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eAluminum, grey anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eInternal Baffles\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eKnife-edge (tube and focuser)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eRetractable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eLength (dew shield extended)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e20.2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eLength (dew shield retracted)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e17.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e104mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDew Shield Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e122mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWeight (with rings and handle)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e12.2 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eHeaviest Single Component\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e9.2 lbs (OTA only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eDovetail\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eLosmandy-style D-plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eTube Rings\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eHinged CNC with carry handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eFinder Shoes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003eTwo Vixen-style (on focuser body)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eCase\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003ePadded soft case with carry handle and shoulder strap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc; font-weight: bold; width: 50%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; border: 1px solid #cccccc;\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":41598582685769,"sku":"AT90EDX","price":1574.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT90EDX_1-9522.jpg?v=1731697710"},{"product_id":"astro-tech-at130edx-f-7-fcd100-ed-triplet-apo","title":"Astro-Tech AT130EDX f\/7 FCD100 ED Triplet APO","description":"\u003cp\u003eThere are scopes you buy because they're good for the price. And there are scopes you buy because they're good.\u003c\/p\u003e\n\u003cp\u003eThe AT130EDX is the latter. One hundred thirty millimeters of  FCD100 extra-low dispersion glass as the center element, mated to a lanthanum crown — the combination that produces the cleanest color correction we've ever put in a tube. Every unit is tested to a guaranteed minimum Strehl ratio of 0.95 at 532nm. It rides on a 3.7\" dual-speed rack-and-pinion focuser that holds 15 pounds without a hint of sag or shift. It ships in a fitted, foam-lined hard case. And it comes with a removable tube section that lets you use binoviewers natively — no Barlow, no corrector, no compromises.\u003c\/p\u003e\n\u003cp\u003eThis is the scope we'd build if we could only build one.\u003c\/p\u003e\n\u003ch3\u003eThe Glass\u003c\/h3\u003e\n\u003cp\u003eThe AT130EDX is not an AT130EDT with upgraded glass. It's a different instrument. The EDT line uses FK-61 — our FPL-51 equivalent — and it's an excellent telescope for the money. The EDX uses FCD100, one of the finest extra-low dispersion glasses available, paired with a lanthanum element. Every objective is tested at 532nm green light and guaranteed to a minimum Strehl ratio of 0.95. That's not a design target — it's a tested, verified floor. The result isn't an incremental improvement in color correction. It's a step change.\u003c\/p\u003e\n\u003cp\u003eWhat you notice first is what's absent: no violet fringe on bright stars, no secondary spectrum bleeding into high-contrast planetary views. Jupiter's cloud bands stay clean at 200×. Saturn's rings separate from the globe without a haze line between them. The Moon at the terminator is high-contrast and color-neutral — the kind of view where you stop thinking about the optics and start thinking about what you're looking at.\u003c\/p\u003e\n\u003cp\u003eFor imaging, the FCD100 triplet produces star images that are tight and round across the field. Chromatic aberration is controlled to a level that makes color channel alignment nearly effortless in processing. You can push integration times and stacking depth without chasing purple fringes out of your data.\u003c\/p\u003e\n\u003ch3\u003eThe Focuser\u003c\/h3\u003e\n\u003cp\u003eThe 3.7\" dual-speed rack-and-pinion focuser is the largest in the AT lineup, and it's built to handle serious imaging loads. A 10:1 microfine focusing knob gives you precise control, while the full 360° rotation and built-in camera angle adjuster let you frame your target without disturbing focus or alignment. It holds up to 15 lbs — enough for a full-frame camera, off-axis guider, and filter wheel without flexure.\u003c\/p\u003e\n\u003cp\u003eThe focuser drawtube has millimeter markings for repeatable focus positions and a lock knob for long-exposure work. Both 2\" and 1.25\" eyepiece holders use non-marring brass compression rings that won't score your accessories. For astrophotographers running autofocus, the focuser includes pre-tapped holes for the ZWO EAF and most popular motorized focus systems — mount it directly, no bracket fabrication required.\u003c\/p\u003e\n\u003cp\u003eThe focuser body is threaded with both M92×1 and M68×1 female connections, giving you direct, rigid paths to reducers, flatteners, or off-axis guiders. No aftermarket adapter chains. No tilted connections. Build your imaging train threaded and solid from the start.\u003c\/p\u003e\n\u003ch3\u003eBinoviewing — Built In\u003c\/h3\u003e\n\u003cp\u003eA 100mm removable tube section is built into the optical tube. Remove it, attach your binoviewers, and observe with both eyes — without a Barlow or optical corrector in the light path. That's brighter, higher-contrast views and a more balanced setup at the eyepiece. This is a feature you typically find on scopes costing substantially more, if you find it at all.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e130mm f\/7 FCD100 triplet APO — tested to ≥0.95 Strehl.\u003c\/strong\u003e FCD100 center element with lanthanum mating element. 910mm focal length. Every unit tested at 532nm and guaranteed to a minimum Strehl of 0.95. This is not a sample spec — it's the floor for every scope that ships.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.7\" dual-speed rack-and-pinion focuser.\u003c\/strong\u003e 10:1 microfine ratio. 15-lb payload. 360° rotation with camera angle adjuster. Lock knob. Millimeter-marked drawtube. Pre-tapped for ZWO EAF.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM92×1 and M68×1 focuser threads.\u003c\/strong\u003e Dual female thread options for direct connection to reducers, flatteners, and off-axis guiders. Build a rigid, threaded imaging train without adapter stacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100mm removable binoviewing section.\u003c\/strong\u003e Native binoviewer access without a Barlow or corrector. Brighter, higher-contrast two-eye views on Moon, planets, and bright deep-sky objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable dew shield.\u003c\/strong\u003e Suppresses stray light and dew formation, it also helps eliminate reflections from nearby light sources — yard lights, headlamps, red flashlights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnife-edge baffles and blackened lens edges.\u003c\/strong\u003e Internal contrast engineering: the darkest possible sky background, faint objects that stand out, and bright stars that stay tight without scatter or haze.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo Vixen finder shoes machined into OTA.\u003c\/strong\u003e Mount a guide scope and a red-dot finder simultaneously without rotation adapters. Leave both in place between sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSplit-hinged tube rings, white felt lined.\u003c\/strong\u003e Precision-machined rings with soft lining that won't mark the powder coat. Generous clamping force without flex.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLosmandy-style dovetail plate.\u003c\/strong\u003e Compatible with heavy-duty equatorial and alt-az mounts. Bolted to the tube ring assembly — not adhesive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop-mounted Vixen carry handle.\u003c\/strong\u003e Safe transport and setup in the dark. The handle stays on the rings and doubles as a finder shoe mounting point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitted hard case included.\u003c\/strong\u003e Foam-lined, metal-reinforced. Protects the investment in storage and transit. This isn't an aftermarket add-on — it ships with the scope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" and 1.25\" eyepiece holders.\u003c\/strong\u003e Both use non-marring brass compression rings. No set screws to score your barrels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnder the Night Sky\u003c\/h3\u003e\n\u003cp\u003eThe AT130EDX at 910mm f\/7 is a visual observer's refractor first — one hundred thirty millimeters of clean, color-free aperture that rewards high magnification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eJupiter\u003c\/strong\u003e at 200× in the AT130EDX is the kind of view that makes you pause. The North and South Equatorial Belts are sharp-edged and show internal structure — festoons, barges, color gradients between the tawny belt material and the blue-gray zones. The Great Red Spot, when rotated into view, shows an oval with defined boundaries and subtle internal texture. At 260× on a steady night, you're at the scope's theoretical maximum useful magnification and the planet holds. There's no secondary color pulling the image apart.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSaturn\u003c\/strong\u003e shows the Cassini Division as a clean, dark line at 150× — not a smudge of reduced brightness, but a black gap between ring A and ring B. The crepe ring (ring C) shows against the globe at 200×. The shadow of the globe on the rings is razor-sharp. The globe itself shows subtle banding in the equatorial zone. These are the details that separate premium optics from merely good optics.\u003c\/p\u003e\n\u003cp\u003eFor \u003cstrong\u003edouble stars\u003c\/strong\u003e, the AT130EDX resolves to its theoretical limit of 0.89 arc seconds. Tight pairs like Porrima (Gamma Virginis) and Castor show clean, separated Airy discs with dark sky between them — the signature of optics that aren't scattering light into a haze around the diffraction pattern. Wider colored doubles like Albireo and Almach pop with vivid color contrast.\u003c\/p\u003e\n\u003cp\u003eOn \u003cstrong\u003edeep sky\u003c\/strong\u003e, 130mm of clean aperture at 910mm gives you real reach into galaxy structure and globular resolution. M13 begins to resolve into individual stars across most of the cluster face at 150×. M51 shows both spiral arms and the bridge to its companion. The Veil Nebula with an OIII filter shows fine filamentary structure — wisps and braids that a smaller aperture smooths over. NGC 7331 and its companion galaxies resolve in the same field.\u003c\/p\u003e\n\u003cp\u003eFor \u003cstrong\u003eimaging\u003c\/strong\u003e, the FCD100 triplet produces tight, color-free star fields that stack cleanly. The 3.7\" focuser and M92\/M68 threads let you build a rigid imaging train with no adapter flex. At f\/7, sub-exposure times are reasonable for broadband work, and the flat field produced with the matched V3 flattener or reducer covers full-frame sensors edge to edge. The pre-tapped EAF mount puts autofocus one connection away.\u003c\/p\u003e\n\u003ch3\u003eObserving Tip\u003c\/h3\u003e\n\u003cp\u003eDon't overlook the removable tube section. Binoviewers typically require added optical path to reach focus, and most scopes need a Barlow to get there — which changes magnification and adds glass to the light path. The AT130EDX lets you remove 100mm of tube and reach focus natively with most binoviewers. The result is brighter, higher-contrast two-eye views at the magnification you chose, not the magnification the Barlow imposes. If you own binoviewers and haven't tried them on a premium refractor without a Barlow, this scope will change your mind about what binoviewing can do.\u003c\/p\u003e\n\u003ch3\u003eCommunity Says\u003c\/h3\u003e\n\u003cp\u003eThe AT130EDX comes up regularly in Cloudy Nights comparison threads — often against scopes costing significantly more:\u003c\/p\u003e\n\u003cp\u003e\"The AT130 EDX is also bino-friendly, 10mm more glass than the TSA120, and with a better focuser... Never liked that the Askar's would not list the ED glass used. Perhaps good scopes, but when someone is paying thousands of dollars I believe they have a right to know what they are paying for.\" \u003c\/p\u003e\n\u003cp\u003e\"I also would recommend the AT130 EDX. I have an excellent Askar but it was hand selected — otherwise it is a lottery.\" \u003c\/p\u003e\n\u003cp\u003e\"For the planets, the optical quality of the APM 140 fast doublet and the low priced Askar 140 is not going to compete with the 130EDX with its optical quality guaranteed minimum Strehl... Of the telescopes on your list, I would pick the 130EDX. I think the difference in double star observing with the 140's greater aperture over the 130EDX will NOT be that noticeable. But, when planetary observing, the 130s higher optical quality WILL BE noticeable when compared to the two 140s.\" \u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes the AT130EDX different from the AT130EDT?\u003c\/strong\u003e\u003cbr\u003eDifferent glass, different focuser, different tier. The EDT uses FK-61 (our FPL-51 equivalent) and a 3.2\" focuser. The EDX uses FCD100 with a lanthanum mating element, tested to a guaranteed minimum 0.95 Strehl at 532nm, and a 3.7\" focuser with a 15-lb payload. The EDX adds dual M92\/M68 focuser threads, a removable binoviewing section, knife-edge baffles, and a fitted hard case. The EDT is an excellent scope for its price point. The EDX is our best refractor, period.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the AT130EDX compare to the Takahashi TSA-120?\u003c\/strong\u003e\u003cbr\u003eBoth are premium refractors. The TSA-120 is a beautifully made 120mm scope with a legendary reputation. The AT130EDX gives you 130mm of aperture — 10mm more glass — with a larger focuser (3.7\" vs. Tak's 3.3\") and native binoviewing capability. The FCD100 triplet provides comparable color correction. The AT130EDX offers more aperture, higher payload capacity, and more mechanical features at a similar price point. We sell both — each is an excellent scope for a slightly different buyer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the AT130EDT's reducers and flatteners with the EDX?\u003c\/strong\u003e\u003cbr\u003eYes. The V3 0.8× reducer\/field flattener (AT130EDTRFv3) is compatible with both the AT130EDT and the AT130EDX — it connects via M92 thread to the focuser drawtube. The EDX's M68 thread provides an additional connection option for M68-based accessories.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mount do I need?\u003c\/strong\u003e\u003cbr\u003eThe AT130EDX weighs 24.55 lbs with rings, dovetail, and handle. Add a camera, filter wheel, and guide scope for imaging, and you're looking at 28–30 lbs of payload. A mount rated for at least 40 lbs of imaging payload is recommended — something in the HEQ5 Pro \/ EQ6-R \/ iOptron CEM40 class or above. For visual use, you can run lighter since tracking accuracy is less critical, but the mount still needs to handle 25+ lbs comfortably.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with eyepieces?\u003c\/strong\u003e\u003cbr\u003eNo — the AT130EDX is an OTA (optical tube assembly) only. It includes tube rings, Losmandy dovetail, carry handle, and hard case. You supply eyepieces, diagonal, and mount.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the focuser motorizable?\u003c\/strong\u003e\u003cbr\u003eYes. The focuser housing has pre-tapped holes for mounting a ZWO EAF or most popular motorized focus systems directly. No custom bracket fabrication needed.\u003c\/p\u003e\n\u003ch3\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp\u003eThe AT130EDX is the scope we've been building toward for forty-five years. Not the most affordable refractor in the catalog — that was never the point. This is the one where the glass, the focuser, the mechanical details, and the optical testing all meet the same standard. If you've owned a good 80mm or 100mm APO and wondered what the next level looks like, this is it. If you're comparing 130mm and 140mm refractors across brands and price points, look at what's included in the box, what glass is in the tube, and whether the optics are tested before they ship. The AT130EDX answers all three.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold; width: 42%;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eAT130EDX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eAperture\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e130mm (5.12\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e910mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eApochromatic triplet —  FCD100 ED + lanthanum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eStrehl Ratio\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e≥0.95 guaranteed (tested at 532nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eResolution\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e0.89 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eVisual Limiting Magnitude\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e13.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e260×\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e3.7\" dual-speed rack-and-pinion, 10:1 microfine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eFocuser Payload\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e15 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eFocuser Rotation\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e360° with camera angle adjuster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eFocuser Threads\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eM92×1 female, M68×1 female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eEyepiece Holders\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e2\" and 1.25\", brass compression rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eMotorized Focus\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003ePre-tapped for ZWO EAF and compatible systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eBinoviewing\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e100mm removable tube section (no Barlow required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eDew Shield\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eRetractable, flocked interior\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eInternal Baffling\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eKnife-edge baffles, blackened lens edges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eFinder Shoes\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eTwo Vixen-style, machined into OTA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eTube Rings\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eSplit-hinged, white felt lined, precision-machined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eDovetail\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eLosmandy-style, bolted to rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eCarry Handle\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eTop-mounted Vixen-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eCase\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eFitted hard case, foam-lined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eOTA Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e20.75 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0f4f8;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eWeight with Rings\/Handle\/Dovetail\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e24.55 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 8px 12px; font-weight: bold;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e1 year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":41678465499209,"sku":"AT130EDX","price":2999.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/AT130EDX_1-9441.jpg?v=1731697825"}],"url":"https:\/\/astronomics.com\/collections\/astro-tech-sales.oembed","provider":"Astronomics","version":"1.0","type":"link"}