{"title":"Diagonals \u0026 Prisms","description":"","products":[{"product_id":"1-25-prism-diagonal","title":"Celestron 1.25\" Prism Diagonal","description":"\u003cp\u003eA Star Diagonal lets you view objects that are at a 90° angle from the direction the telescope is pointing, thereby allowing comfortable viewing when the telescope is pointed at, or near, the zenith (i.e. directly overhead). The resulting image is right side up, but will be reversed from left to right. . . .A Star Diagonal lets you view objects that are at a 90° angle from the direction the telescope is pointing, thereby allowing comfortable viewing when the telescope is pointed at, or near, the zenith (i.e. directly overhead). The resulting image is right side up, but will be reversed from left to right.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40221632331849,"sku":"7707","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/3601_1.jpg?v=1662967450"},{"product_id":"1-25-enhanced-aluminum-96-reflectivity-mirror-diagonal","title":"TeleVue 1.25\" Enhanced Aluminum 96% Reflectivity Mirror Diagonal","description":"\u003cp\u003eThis 90° 1.25\" mirror-type star diagonal uses enhanced aluminum mirror coatings for a full 95% reflectivity. The mirror is overcoated with quartz for long life. The mirror housing and 1.25\" barrels are precision-machined from a single block of solid aluminum, rather than being simply a pair of less-rigid tubes screwed into a flimsy plastic mirror housing or sheet metal stamping, as with lesser imported diagonals. A solid metal backplate over 4\/10ths of an inch thick holds the mirror securely in the correct optical alignment. Both focuser and eyepiece barrels are antireflection threaded internally for higher contrast. The 1.25\" barrel that fits into the focuser or visual back is also threaded to accept standard 1.25\" filters.\u003c\/p\u003e\n\u003cp\u003eThe 1.25\" eyepiece barrel uses a non-marring soft brass compression ring to hold eyepieces in place, rather than a thumbscrew that contacts the eyepiece barrel directly. A groove cut into the outside of the barrel acts as a safety stop to keep the diagonal from falling should the scope's visual back or eyepiece holder thumbscrew loosen slightly from cold or use.\u003c\/p\u003e\n\u003cp\u003eThis premium 1.25\" diagonal is a worthy and visible upgrade for virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 1.25\" prism-type star diagonal.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":40221633413193,"sku":"7781C","price":216.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/DSC_0125_EA_1.25in_90degcopy.jpg?v=1723660298"},{"product_id":"1-25-everbrite-99-reflectivity-mirror-diagonal","title":"TeleVue 1.25\" Everbrite 99% Reflectivity Mirror Diagonal","description":"\u003cp\u003eThis 90° 1.25\" mirror-type star diagonal has Everbrite dielectric mirror coatings for 99% reflectivity. In addition to higher reflectivity than a conventional aluminum or silver coated diagonal, the Everbrite coatings also provide higher contrast and resolution during critical planetary, lunar, and binary star observations.\u003c\/p\u003e\n\u003cp\u003eThe mirror housing and 1.25\" barrels are precision-machined from a single block of solid aluminum, rather than being simply a pair of less-rigid tubes screwed into a flimsy plastic mirror housing or sheet metal stamping, as with lesser imported diagonals. A solid metal backplate over 4\/10ths of an inch thick holds the mirror in perfect optical alignment. Both focuser and eyepiece barrels are antireflection threaded internally for higher contrast. The 1.25\" barrel that fits into the focuser or visual back is also threaded to accept standard 1.25\" filters.\u003c\/p\u003e\n\u003cp\u003eThe 1.25\" eyepiece barrel uses a non-marring soft brass compression ring to hold eyepieces in place, rather than a thumbscrew that contacts the eyepiece barrel directly. A groove cut into the outside of the barrel acts as a safety stop to keep the diagonal from falling should the scope's visual back or eyepiece holder thumbscrew loosen slightly from cold or use.\u003c\/p\u003e\n\u003cp\u003eThis is an absolutely premium 1.25\" diagonal that will give you all the visual performance your scope is capable of delivering. It's a worthy and visible upgrade for virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 1.25\" star diagonal.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":40221635280969,"sku":"7781PC","price":325.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/DPC_1250_EB_1.25in_90degcopy_b5a0521d-aed3-433c-b943-309b6bcd82df.jpg?v=1723660283"},{"product_id":"1-10th-wave-accuracy-2-compression-ring-mirror-w-1-25-adapter","title":"Takahashi 1\/10Th Wave Accuracy 2\" Compression Ring Diagonal w\/ 1.25\" Adapter","description":"\u003cp\u003eThis 2\" diagonal uses a telescope-grade elliptical mirror with a guaranteed 1\/10th wave surface accuracy for superb high contrast\/high detail lunar, planetary, and deep space images.\u003c\/p\u003e\n\u003cp\u003eThis 2\" first surface mirror diagonal has a guaranteed 1\/10th wave surface accuracy for high contrast\/highly detailed images, particularly of small lunar and planetary features. It uses enhanced aluminum mirror coatings for a high reflectivity in the 95-96% range. It can be used with any brand of refractor having a 2\" focuser and a minimum of 4.2\" of back focus (the length of the light path through the diagonal).\u003c\/p\u003e\n\u003cp\u003eThe diagonal can be used on the Takahashi FSQ-106 refractor by removing the diagonal's 2\" chrome barrel and replacing it with the Takahashi #TDR0200 adapter ring to accommodate the short back focus of the FSQ-106. The diagonal can also be used on Schmidt-Cassegrain telescopes by adding a #7785SC 2\" diagonal adapter.\u003c\/p\u003e\n\u003cp\u003eThe diagonal uses a telescope's precision-polished elliptical diagonal mirror with a 40mm m.a., rather than the more-economical rectangular mirror used on other diagonals. Small safety stops are provided at the bottom of the 2\" eyepiece holder tube to prevent 2\" eyepieces or 2\" Barlows from hitting the surface of the mirror. The mirror housing is machined from solid aluminum. The interior of the 2\" chrome barrel that fits into the focuser or visual back is painted matte black and is internally antireflection threaded for higher contrast. It is also threaded to accept standard 2\" (48mm) filters. There is a machined safety groove cut into the chrome barrel which engages your telescope's focuser thumbscrew to help keep the diagonal from falling to the ground should the thumbscrew accidentally loosen during use.\u003c\/p\u003e\n\u003cp\u003eA supplied 1.25\" adapter slips into the 2\" eyepiece holder tube of the diagonal to allow the use of 1.25\" eyepieces. Knurled thumbscrews hold eyepieces and the 1.25\" adapter securely in place. Dust covers are provided for both sides of the diagonal.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003cbr\u003e\n\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e18 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":40221645602889,"sku":"TDM0200","price":650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/5360_1.jpg?v=1662967077"},{"product_id":"1-25-99-percent-reflectivity-everbite-mirror-60-degree-viewing","title":"TeleVue 1.25\" 99 Percent Reflectivity Everbrite Mirror, 60 Degree Viewing","description":"\u003cp\u003eThis unique 60° viewing angle 1.25\" diagonal allows more comfortable extended viewing of objects near the ecliptic (the Moon and planets, among others), as well as more comfortable terrestrial observing. There's less bending of the neck involved when observing these objects, leading to less strain and fewer cricks in the neck and shoulders.\u003c\/p\u003e\n\u003cp\u003eIn addition, the diagonal uses Everbrite dielectric coatings on its first-surface mirror for an astonishing 99% reflectivity. In addition to higher reflectivity than a conventional aluminum or silver coated diagonal, the Everbrite coatings also provide higher contrast and resolution during critical observations of subtle low-contrast lunar and planetary details.\u003c\/p\u003e\n\u003cp\u003eThe mirror housing is precision-machined from a single block of solid aluminum, rather than simply a flimsy plastic housing or sheet metal stamping, as with lesser imported diagonals. A solid metal backplate over 4\/10ths of an inch thick holds the mirror in perfect optical alignment. Both focuser and eyepiece barrels are antireflection threaded internally for higher contrast. The 1.25\" barrel that fits into the focuser or visual back is also threaded to accept standard 1.25\" filters. A groove cut into the outside of the barrel acts as a safety stop to keep the diagonal from falling should the scope's visual back or eyepiece holder thumbscrew loosen slightly from cold or use. The 1.25\" eyepiece barrel uses a non-marring soft brass compression ring to hold eyepieces in place, rather than a thumbscrew that contacts the eyepiece barrel directly.\u003c\/p\u003e\n\u003cp\u003eThis is an absolutely premium 1.25\" diagonal that will give you all the visual performance your scope is capable of delivering. It works with virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 1.25\" star diagonal. It's a worthy and visible upgrade for the lunar, planetary, or terrestrial observer.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":40221645668425,"sku":"7786PC","price":369.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/DPC_6012_EB_1.25in_60deg_copy.jpg?v=1723660067"},{"product_id":"45-prism-for-1-25-eyepieces","title":"Celestron 45° Prism for 1.25\" Eyepieces","description":"\u003cp\u003eThis 45-degree viewing angle image erecting diagonal is designed to use 1.25\" eyepieces in catadioptric scopes with a 1.25\" visual back or in refractors with a 1.25\" focuser drawtube. It is not usable with reflectors. It increases the magnification by approximately 8%. Two brass thumbscrews hold eyepieces firmly in place. It is fully coated for high light transmission.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e6 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40221656678473,"sku":"6329","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/94112-a_diagonal_direct_01_1_570x380_2x_def2f67f-f1dd-423e-b401-d2f3aa5da55a.webp?v=1721419760"},{"product_id":"1-25-99-reflectivity-dielectric-mirror-diagonal","title":"Astro-Tech 1.25\" 99% Reflectivity Dielectric Mirror Diagonal","description":"\u003cp\u003eThis 1.25\" Astro-Tech first-surface mirror star diagonal was named a \u003cem\u003eSky \u0026amp; Telescope Hot Product for 2007! \u003c\/em\u003eSky \u0026amp; Tel recognized that the Astro-Tech diagonal would be an outstanding value at even twice its low price. As it is, this Astro-Tech diagonal is unique among 1.25\" star diagonals for its exceptional price\/performance ratio. This is one premium-quality diagonal that doesn't happen to be priced like one - and it's still a hot product for many observers.\u003c\/p\u003e\n\u003cp\u003eThe Astro-Tech 1.25\" diagonal has state-of-the-art \u003cem\u003e46-layer \u003c\/em\u003edielectric mirror coatings for a full 99% reflectivity. This is markedly higher reflectivity than the 88% of a conventional aluminum diagonal or the 96-97% of an easily-tarnished silver diagonal. The result? Extremely faint deep space objects at your scope's performance limits become more visible, changing your viewing from \"I guess I see it\" to \"it's really there!\"\u003c\/p\u003e\n\u003cp\u003eThe mirror housing is precision-machined from solid aluminum, rather than simply flimsy Bakelite plastic or a sheet metal stamping, as you'll find with ordinary diagonals. A rigid machined metal backplate with stainless steel hardware holds the mirror in perfect optical alignment in the machined body. The interior of the body is anodized an antireflective matte black. The focuser-side barrel is also anodized antireflective matte black, and is internally antireflection threaded for even higher contrast. The barrel is threaded to accept standard 1.25\" filters.\u003c\/p\u003e\n\u003cp\u003eThe 1.25\" eyepiece holder uses a non-marring soft brass compression ring to clamp eyepieces in place, rather than a thumbscrew that can scratch an eyepiece barrel by tightening down on it directly.\u003c\/p\u003e\n\u003cp\u003eA shallow slanted groove cut into the outside of the focuser-side barrel engages with the scope's visual back or eyepiece holder thumbscrew to act as a safety stop. This keeps the diagonal from falling should the scope's thumbscrew loosen slightly from cold or use. Dust covers are provided for both sides of the diagonal.\u003c\/p\u003e\n\u003cp\u003eThis premium 1.25\" diagonal works with virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 1.25\" star diagonal,. It will provide a visible improvement on deep space objects over the scope's factory-supplied diagonal. The newly designed body of the Astro-Tech diagonal is more compact than previous diagonals. This essentially eliminates any possibility of the diagonal bumping into the drive base of a short fork arm catadioptric when the scope is pointed at the zenith. This \u003cem\u003eSky \u0026amp; Tel Hot Product \u003c\/em\u003egives you all the visual performance your scope is capable of delivering, at a price that's very affordable.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5.5 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40221659529289,"sku":"AT1D","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/10475_1.jpg?v=1662967572"},{"product_id":"astro-tech-2-99-reflectivity-dielectric-mirror-diagonal-for-refractors","title":"Astro-Tech 2\" 99% Reflectivity Dielectric Mirror Diagonal For Refractors","description":"\u003cp\u003eThis 2” dielectric mirror-type star diagonal is an outstanding value. At this low price, if there ever was a bargain in astronomy, this is it.\u003c\/p\u003e\n\u003cp\u003eThis 2” Astro-Tech first-surface mirror star diagonal has state-of-the-art 46-layer dielectric mirror coatings for a full 99% reflectivity, higher than the 88% of a conventional aluminum diagonal or the 96-97% of an easily-tarnished silver diagonal.\u003c\/p\u003e\n\u003cp\u003eThe durable ion-deposited dielectric coatings on the mirror’s finely-polished 10mm thick 1\/10th wave BK7 optical glass substrate also provide higher contrast and resolution during critical planetary, lunar, and binary star observations.\u003c\/p\u003e\n\u003cp\u003eThe supplied 1.25” eyepiece adapter uses a compression ring to hold eyepieces in place. The scope-side barrel of the 1.25” adapter has a subtle slanted groove to keep it from accidentally slipping out of the 2” diagonal. Dust covers are provided for the 1.25” adapter and the diagonal’s 2” barrel.\u003c\/p\u003e\n\u003cp\u003eThe interior of the diagonal body and the inside of the focuser-side barrel are treated with light absorbing materials. The focuser-side barrel is also internally anti-reflection threaded for even higher contrast. The barrel is threaded to accept standard 2” filters.\u003c\/p\u003e\n\u003cp\u003eA subtle slanted groove cut into the outside of the focuser-side 2” barrel engages with your telescope’s focuser thumbscrew to act as a safety stop. This keeps the diagonal from falling should the scope’s thumbscrew loosen slightly from cold or use.\u003c\/p\u003e\n\u003cp\u003eThis diagonal is a visible improvement over the conventional 2\" diagonal provided with many refractors capable of using 2” optics. It can also be used with a Schmidt-Cassegrain or Maksutov-Cassegrain telescope with a suitable adapter, such as the #7785C. It is an absolutely premium 2” 99% reflectivity dielectric self-centering star diagonal at a fraction the price of competitive models with equivalent performance and build quality. The same performance, for as little as half the price. If there ever was a bargain in astronomy, this is it.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e17 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40221659562057,"sku":"AT2D","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/img_1913.jpg?v=1662967573"},{"product_id":"2-99-reflectivity-dielectric-mirror-diagonal-for-scts","title":"Astro-Tech 2\" 99% Reflectivity Dielectric Mirror Diagonal for SCTs","description":"\u003cp\u003eThis 2\" \u003cem\u003edielectric \u003c\/em\u003emirror-type star diagonal is designed to give you first-class performance with a Schmidt-Cassegrain - at a money-saving and far from first-class price.\u003c\/p\u003e\n\u003cp\u003eThis 2\" Astro-Tech first-surface mirror star diagonal for catadioptric telescopes has state-of-the-art \u003cem\u003e46-layer \u003c\/em\u003edielectric mirror coatings for a full 99% reflectivity, higher than the 88% of a conventional aluminum diagonal or the 96-97% of an easily-tarnished silver diagonal. The durable ion-deposited dielectric coatings on the mirror's finely-polished 10mm thick 1\/10th wave BK7 optical glass substrate also provide higher contrast and resolution during critical planetary, lunar, and binary star observations. It has a physically short nosepiece and SCT rear cell attachment ring so it can clear the drive base on your telescope. You don't have to buy a special version of the diagonal or special adapters to be sure that it can swing through your 8\" scope's fork arms, as you do with some competitive diagonals. This Astro-Tech diagonal is, quite simply, unique among premium-quality 2\" SCT star diagonals for its exceptional value.\u003c\/p\u003e\n\u003cp\u003eThe SCT rear cell attachment ring will thread directly onto Celestron SCT rear cells and onto the rear cells of those Meade SCTs that do not have the electric microfocuser as standard equipment, These include older 2080 and 2120 scopes; all LX3, LX5, LX6, and Premier scopes; all current and past LX90s; and all earlier LX200 scopes that were supplied without microfocuser. The diagonal will thread onto a microfocuser-equipped scope if you install the SCT rear cell ring that came with the focuser into the microfocuser's 2\" drawtube. If you want a diagonal that will slip directly into the microfocuser's 2\" drawtube, order diagonal \u003ca href=\"astro-tech-2-inch-99-percent-reflectivity-dielectric-mirror-diagonal-refractors_p10504.aspx\"\u003e#AT2D 2\" 99% Reflectivity dielectric mirror diagonal for refractors\u003c\/a\u003e instead.\u003c\/p\u003e\n\u003cp\u003eThe mirror housing is precision-machined from solid aluminum, rather than simply flimsy plastic or a sheet metal stamping, as you'll find with ordinary diagonals. A rigid U-shaped die-cast metal backplate with stainless steel hardware holds the mirror in perfect optical alignment in the machined body. The solidity of the construction is mirrored in the diagonal's substantial 17 ounce weight.\u003c\/p\u003e\n\u003cp\u003eThe interior of the body is lined with light absorbing materials, in addition to being anodized an antireflective matte black. The short nosepiece that holds the rear cell attachment ring is internally antireflection threaded for high contrast. The attachment ring fits both Celestron and Meade rear cells. It is knurled for a sure grip so it can be easily loosened, allowing you to rotate the diagonal to the most comfortable observing position.\u003c\/p\u003e\n\u003cp\u003eRather than using a metal thumbscrew that contacts eyepiece barrels directly and can scratch them, the diagonal's 2\" eyepiece holder uses a non-marring soft brass compression ring to firmly hold 2\" eyepieces and the standard equipment 1.25\" eyepiece adapter. The knurled chrome thumbscrew that operates the compression ring is a full 1\/2\" in diameter, twice that of competitive diagonals. This provides a sure grip in cold weather when wearing gloves or mittens.\u003c\/p\u003e\n\u003cp\u003eThe 1.25\" eyepiece adapter also uses a compression ring to hold eyepieces in place. The 1.25\" adapter has a slanted groove cut into the outside of its focuser-side 2\" barrel. This engages with the diagonal's compression ring to act as a safety stop to keep the adapter from accidentally slipping out of the 2\" diagonal should the compression ring loosen during use. Dust covers are provided for the 1.25\" adapter and the diagonal's SCT attachment ring.\u003c\/p\u003e\n\u003cp\u003eThis diagonal is a visible improvement over the standard 1.25\" prism diagonal provided with virtually every Schmidt-Cassegrain or Maksutov-Cassegrain telescope. It is an absolutely top-rank 2\" 99% reflectivity dielectric star diagonal at only a fraction the price of competitive models with equivalent performance and build quality. The same premium performance, for as little as half the price. If there ever was a bargain in SCT astronomy, this is it.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e17 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astro-Tech","offers":[{"title":"Default Title","offer_id":40221659594825,"sku":"AT2SD","price":149.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/10507_1.jpg?v=1662967575"},{"product_id":"2-starbright-xlt-enhanced-aluminum-mirror-diagonal-for-scts","title":"Celestron 2\" Starbright XLT Enhanced Aluminum Mirror Diagonal for SCTs","description":"This Celestron 2\" mirror star diagonal for catadioptric telescopes has Starbright XLT enhanced aluminum multicoatings for a reflectivity of better than 96%. They're the same high tech mirror coatings that are used to get industry-leading optical performance out of Celestron telescopes costing over $6600.\n\u003cp\u003eThe diagonal has a physically short nosepiece and SCT rear cell attachment ring to clear the drive base on your telescope. You don't have to buy a special short version of the diagonal or special adapters to let it swing through your 8\" scope's fork arms, as you do with some higher-priced competitive diagonals.\u003c\/p\u003e\n\u003cp\u003eThe SCT rear cell attachment ring threads directly onto all Celestron 5\" and larger SCT rear cells and onto the rear cells of those Meade SCTs that do not have the electric microfocuser as standard equipment, These include Meade's older 2080 and 2120 scopes; all LX3, LX5, LX6, and Premier scopes; all current and past LX90s; and all earlier LX200 scopes that were supplied without microfocuser. The diagonal will thread onto a Meade microfocuser-equipped scope if you install the SCT rear cell ring that came with the Meade focuser into the microfocuser's 2\" drawtube.\u003c\/p\u003e\n\u003cp\u003eThe diagonal uses an interferometer-tested 1\/10th wave first-surface mirror for sharp, distortion-free images. The mirror housing is machined from solid aluminum, rather than simply a flimsy plastic box or a sheet metal stamping, as you'll find with ordinary diagonals. The solidity of the construction is mirrored in the diagonal's substantial 17 ounce weight.\u003c\/p\u003e\n\u003cp\u003eThe interior of the body is lined with light absorbing foam, in addition to being anodized an antireflective matte black. The short nosepiece that holds the SCT rear cell attachment ring is internally antireflection threaded for high contrast. The attachment ring is knurled for a sure grip so it can be easily loosened, allowing you to rotate the diagonal to the most comfortable observing position.\u003c\/p\u003e\n\u003cp\u003eRather than using a metal thumbscrew that contacts eyepiece barrels directly and can scratch them, the diagonal's 2\" eyepiece holder uses a non-marring soft brass compression ring to firmly hold 2\" eyepieces and the supplied 1.25\" eyepiece adapter. The knurled chrome thumbscrew that operates the compression ring is a full 1\/2\" in diameter to provide a sure grip in cold weather when wearing gloves or mittens.\u003c\/p\u003e\n\u003cp\u003eThe 1.25\" eyepiece adapter also uses a compression ring to hold eyepieces in place. The 1.25\" adapter is threaded to accept 2\" (48mm) filters. It has a slanted groove cut into the outside of its 2\" barrel. This engages with the diagonal's compression ring to act as a safety stop to keep the adapter from accidentally slipping out of the 2\" diagonal should the compression ring loosen during use. Dust covers are provided for both the 1.25\" adapter and the diagonal's SCT attachment ring. The diagonal comes in a foam-fitted locking aluminum-frame case for storage and protection.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e17 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40221659725897,"sku":"7719","price":184.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/11608_1.jpg?v=1662967581"},{"product_id":"takahashi-4-turret-1-25-eyepiece-holder","title":"Takahashi 4 Turret 1.25\" Eyepiece Holder","description":"Looking for a quick way to change magnifications and not use a zoom eyepiece?  This great accessory from Takahashi might be the ticket.A night of observing is a wonderful experience.  The only drawback you might have is that you have way too many eyepieces you want to use and tire of continuing to go back and forth into your eyepiece bag.  The Takahashi turret could be your answer.\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe turret has the ability to safely hold four 1.25\" eyepieces for basically any observing needs you might have.  The turret act like a standard 90° star diagonal so your viewing position remains unchanged as you switch between eyepieces.  The Takahashi turret has a click-stop design with an eyepiece indicator mark so you can not only feel, but see when each eyepiece is seated properly.  The eyepieces are held in the turret by means of non-marring compression rings. A twist-ring adjusts the tightness of the compression ring, rather than a thumbscrew. Metal plugs seal four 1.25\" eyepiece holders when the turret diagonal is not in use. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe turret has a 2\" nosepiece with safety groove that slips into the 2\" focuser drawtube of your refractor or Cassegrain telescope.  If you have a Schmidt-Cassegrain, however, you will need to purchase an SCT to 2\" eyepiece adapter as the turret will not simply thread onto your rear cell.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe turret takes up a rather small 81mm of backfocus, so most scopes should be able to work without issue.  However, some Takahashi scopes will require an optional extension tube to achieve focus.  The ones that will need it are listed below.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp style=\"margin: 0px; padding: 0px; outline: none; color: #555555; font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eFC-76S\u003c\/p\u003e\n\u003cp style=\"margin: 0px; padding: 0px; outline: none; color: #555555; font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eFSQ-85\u003c\/p\u003e\n\u003cp style=\"margin: 0px; padding: 0px; outline: none; color: #555555; font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eFSQ-106ED\u003c\/p\u003e\n\u003cp style=\"margin: 0px; padding: 0px; outline: none; color: #555555; font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eFSQ-130ED\u003c\/p\u003e\n\u003cp style=\"margin: 0px; padding: 0px; outline: none; color: #555555; font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eMewlon-250CRS\u003c\/p\u003e\n\u003cp style=\"margin: 0px; padding: 0px; outline: none; color: #555555; font-family: arial, helvetica, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eMewlon-300 CRS\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":40481977958473,"sku":"TAKTUR4","price":640.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/20279.jpg?v=1675379187"},{"product_id":"tele-vue-2-everbrite-star-diagonal-package-with-2-to-1-25-adapter","title":"TeleVue 2\" Everbrite Star Diagonal Package With 2\" To 1.25\" Adapter","description":"\u003cp\u003eThis 90° 2” mirror-type star diagonal has Everbrite dielectric mirror coatings for 99% reflectivity. In addition to higher reflectivity than a conventional aluminum or silver coated diagonal, the Everbrite coatings also provide higher contrast and resolution during critical planetary, lunar, and binary star observations. The diagonal is designed for refractors with 2” focuser drawtubes, but will also work with Schmidt-Cassegrains by adding optional rear cell adapter #7785C. The Tele Vue diagonal now comes standard with the 2\" to 1.25\" satin eyepiece adapter.  \u003cspan\u003eThis high hat step-down adapter allows the use of 1.25\" eyepieces in 2\" focuser drawtubes and 2” star diagonals. The 2\" barrel of the adapter has an undercut groove that the star diagonal\/focuser thumbscrew sits in when tightened down. The extra depth of this groove reduces the chance of the adapter falling out of the focuser should the thumbscrew loosen. To keep your eyepieces looking new, 1.25\" eyepieces are held in the adapter by a non-marring soft brass clamp ring rather than an ordinary aluminum thumbscrew that contacts the barrel directly. The thumbscrew that tightens the clamp ring is tethered internally in the adapter so that the thumbscrew can’t be lost in the field. The body of the adapter is finished in gloss black.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe mirror housing and its 2” focuser and eyepiece holder barrels are precision-machined from a single block of solid aluminum, rather than being simply a pair of less-rigid tubes screwed into a flimsy plastic mirror housing or sheet metal stamping, as is the case with lesser diagonals. A solid metal backplate over 4\/10ths of an inch thick holds the mirror securely in place to assure permanent collimation of the diagonal’s parts. The 2” barrel that fits into the focuser or visual back is internally antireflection threaded for higher contrast. It is also threaded to accept standard 2” (48mm) filters. A groove cut into the outside of the 2” barrel acts as a safety stop to keep the diagonal from falling should the scope’s visual back or eyepiece holder thumbscrew loosen slightly from cold or use. The 2” eyepiece barrel uses a non-marring soft brass compression ring to hold eyepieces in place, rather than a thumbscrew that contacts the eyepiece barrel directly. The diagonal is finished in a non-reflective matte satin black finish.\u003c\/p\u003e\n\u003cp\u003eThis is an absolutely premium 2” star diagonal that will give you all the visual performance your scope is capable of delivering. It's a worthy upgrade for virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 2” star diagonal.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":40481985724489,"sku":"DDP8004","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/ddp_8004_eb2in90d_2to1.25.jpg?v=1675379696"},{"product_id":"tele-vue-schmidt-cassegrain-2-everbrite-diagonal-rich-field-kit","title":"TeleVue Schmidt Cassegrain 2\" Everbrite Diagonal Rich Field Kit","description":"\u003cp\u003eThis kit is designed to allow a premium Tele Vue 2\" Everbrite diagonal attach to your SCT.\u003c\/p\u003e\n\u003cp\u003eThis 90° 2” mirror-type star diagonal has Everbrite dielectric mirror coatings for 99% reflectivity. In addition to higher reflectivity than a conventional aluminum or silver coated diagonal, the Everbrite coatings also provide higher contrast and resolution during critical planetary, lunar, and binary star observations. The diagonal is designed for refractors with 2” focuser drawtubes, but will also work with Schmidt-Cassegrains when using the included rear cell adapter #7785C.\u003c\/p\u003e\n\u003cp\u003eThe Tele Vue diagonal now comes standard with the 2\" to 1.25\" satin eyepiece adapter. This high hat step-down adapter allows the use of 1.25\" eyepieces in 2\" focuser drawtubes and 2” star diagonals. The 2\" barrel of the adapter has an undercut groove that the star diagonal\/focuser thumbscrew sits in when tightened down. The extra depth of this groove reduces the chance of the adapter falling out of the focuser should the thumbscrew loosen. To keep your eyepieces looking new, 1.25\" eyepieces are held in the adapter by a non-marring soft brass clamp ring rather than an ordinary aluminum thumbscrew that contacts the barrel directly. The thumbscrew that tightens the clamp ring is tethered internally in the adapter so that the thumbscrew can’t be lost in the field. The body of the adapter is finished in gloss black.\u003c\/p\u003e\n\u003cp\u003eThe kit also comes standard with this SCT rear cell adapter.  This 2.25” long by 2” diameter adapter tube allows the use of conventional 2” star diagonals (the kind that have a 2” diameter barrel that fits into a refractor’s 2” focuser drawtube) on a Schmidt-Cassegrain telescope’s threaded rear cell. With some smaller aperture telescopes and some 2” diagonals, the 2.25” body of this adapter may let the diagonal hit the drive base when the scope tries to swing the diagonal through the telescope forks. This can be a problem with some computerized scopes when they try to aim at the zenith while in the altazimuth mode. You will need approximately 7” of clearance between the rear cell of your Schmidt-Cassegrain and the tallest point on your telescope drive base to allow this adapter and a typical 2” diagonal (in this example a TeleVue 2”) to clear the base when aimed at the zenith. \u003c\/p\u003e\n\u003cp\u003eOne side of the adapter is threaded to attach onto the 2” diameter rear cell threads of 8” and larger Celestron and Meade Schmidt-Cassegrains (and 7” Meade Maksutov-Cassegrains). The 2” barrel of a conventional 2” star diagonal slips into the other side of the adapter tube and is held firmly in place by a non-marring soft brass clamp ring that tightens onto the diagonal barrel without scratching. The thumbscrew that tightens the clamp ring is internally tethered in the adapter so it can’t be lost in the field.\u003c\/p\u003e\n\u003cp\u003eThe mirror housing and its 2” focuser and eyepiece holder barrels are precision-machined from a single block of solid aluminum, rather than being simply a pair of less-rigid tubes screwed into a flimsy plastic mirror housing or sheet metal stamping, as is the case with lesser diagonals. A solid metal backplate over 4\/10ths of an inch thick holds the mirror securely in place to assure permanent collimation of the diagonal’s parts. The 2” barrel that fits into the focuser or visual back is internally antireflection threaded for higher contrast. It is also threaded to accept standard 2” (48mm) filters. A groove cut into the outside of the 2” barrel acts as a safety stop to keep the diagonal from falling should the scope’s visual back or eyepiece holder thumbscrew loosen slightly from cold or use. The 2” eyepiece barrel uses a non-marring soft brass compression ring to hold eyepieces in place, rather than a thumbscrew that contacts the eyepiece barrel directly. The diagonal is finished in a non-reflective matte satin black finish.\u003c\/p\u003e\n\u003cp\u003eThis is an absolutely premium 2” star diagonal that will give you all the visual performance your scope is capable of delivering. It's a worthy upgrade for virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 2” star diagonal.\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSupplied Accessories: \u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e2\" to 1.25\" adapter SCT rear thread adapter\u003c\/span\u003e\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":40481985790025,"sku":"SCP8202","price":468.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/SCP_8202_SCTPkg_EB2in90_2to1.25_SCTLong.jpg?v=1723747483"},{"product_id":"celestron-2-dielectric-star-diagonal-with-twist-lock","title":"Celestron 2\" Dielectric Star Diagonal With Twist-Lock","description":"\u003cp\u003eEnjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eCelestron 2” Dielectric Star Diagonal with Twist-Lock – The Ultimate Diagonal for Maximum Light Transmission \u0026amp; Sharpness \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eA star diagonal is often an overlooked component of a telescope setup, yet it plays a crucial role in delivering the best possible image to your eyepiece. If you’re still using a standard diagonal, you may not be getting the full potential of your telescope’s optics. The Celestron 2” Dielectric Star Diagonal with Twist-Lock is a premium upgrade designed to dramatically enhance brightness, contrast, and optical alignment, without having to purchase a new telescope. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFeaturing precision-machined construction, over 99% reflectivity from 58 layers of dielectric coatings, and an innovative twist-lock eyepiece holder, this diagonal ensures you get the brightest, sharpest, and most color-accurate views possible. Whether you’re a deep-sky observer, a planetary enthusiast, or an astrophotographer, this diagonal is a must-have accessory that will improve every single view through your telescope. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eWhy Upgrade to a Dielectric Star Diagonal? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eMany astronomers don’t realize how much of a difference a high-quality diagonal can make. Lower-end diagonals, especially those included with beginner telescopes, often introduce optical imperfections, such as: \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eLower reflectivity – Less light reaches your eye, dimming the image. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInternal reflections – Light scatter reduces contrast and sharpness. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInaccurate collimation – Poorly made diagonals misalign the light path, degrading resolution. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInferior coatings – Over time, standard aluminum-coated mirrors can fade or degrade, further reducing light transmission. \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eThe Celestron 2” Dielectric Star Diagonal solves all of these issues, ensuring that virtually all of the light collected by your telescope reaches your eyepiece. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eUltra-High Reflectivity with 58-Layer Dielectric Coatings\u003c\/strong\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eUnlike standard diagonals that use aluminum or silver coatings, which typically reflect only 88-92% of incoming light, this dielectric-coated mirror boasts over 99% reflectivity. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003e\u003cspan class=\"s1\"\u003e🔭\u003c\/span\u003e What does this mean for your viewing experience? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eBrighter planetary details – More light transmission means sharper cloud bands on Jupiter, deeper contrast in Saturn’s rings, and fainter planetary moons become visible. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eImproved deep-sky performance – Faint galaxies, nebulae, and star clusters appear brighter and more detailed. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eMaximum optical efficiency – The light collected by your telescope isn’t wasted in reflection losses, making every observation more rewarding. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eLong-lasting performance – Unlike standard coatings, dielectric coatings won’t degrade over time, ensuring consistent performance for years. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eIf you’ve been using a standard diagonal, you’ll immediately notice the difference—this upgrade delivers brighter, sharper, and more detailed images with every observation. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eTwist-Lock Eyepiece Holder – Secure, Scratch-Free, and Perfectly Aligned \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eOne of the standout features of this diagonal is its twist-lock eyepiece holder, which is a major improvement over traditional thumbscrews. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eKeeps eyepieces perfectly centered – Unlike traditional thumbscrews that can push the eyepiece off-axis, the twist-lock mechanism keeps your eyepiece exactly where it needs to be for perfect optical alignment. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eNo more scratches or damage – Standard set screws can leave marks or even dent your eyepiece barrels. The twist-lock design applies even pressure without damaging your equipment. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eEffortless grip and release – Simply twist to secure or release your eyepiece in seconds, making swapping eyepieces quick and hassle-free. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThis feature is especially useful for astrophotographers, ensuring that cameras, adapters, and accessories remain precisely aligned for sharp, distortion-free images. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eInterchangeable Adapters – Designed for Maximum Compatibility \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eUnlike some diagonals that are limited to a single telescope type, the Celestron 2” Dielectric Star Diagonal is designed to work seamlessly with multiple telescope designs. \u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e2” Barrel Adapter – Fits any refractor or telescope with a 2” focuser, providing a secure push-fit connection. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eSCT Thread Adapter – Threads directly onto Schmidt-Cassegrain (SCT) and EdgeHD telescopes, ensuring a rock-solid mechanical and optical connection. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eBoth adapters thread securely onto the diagonal housing, eliminating the need for extra adapters while providing a sturdy, wobble-free connection. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003ePremium CNC-Machined Construction – Built to Last \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eThe Celestron 2” Dielectric Star Diagonal is not just about premium optics—it’s also built like a tank. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003ePrecision-machined aluminum body – Durable, lightweight, and resistant to corrosion. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eBlack anodized finish – Ensures a sleek, professional look while adding durability. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eGlare-threaded, flat-black interior – Prevents internal reflections, enhancing contrast for the best possible views. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eIntegrated 2” barrel stop – Protects the diagonal mirror by preventing long-barrel accessories from causing damage. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDistinctive orange anodized twist-lock rings – Easy to see in the dark, making eyepiece changes effortless. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eThis combination of premium materials and engineering ensures that your diagonal will provide peak performance for years to come. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eStandard Star Diagonals vs. Dielectric Star Diagonal – Why It Matters \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eA high-quality diagonal is just as important as the rest of your optical train. If your diagonal isn’t reflecting all of the light effectively, you’re losing detail, brightness, and contrast. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003e\u003cspan class=\"s1\"\u003e🔍\u003c\/span\u003e Standard Star Diagonal (Typical Coatings) \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eReflectivity: 88-92% \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eOptical Quality: Basic aluminum coatings, prone to degradation over time \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eAlignment: Set screws can push eyepieces slightly off-axis, leading to optical misalignment \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eBest for: Entry-level use \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003e\u003cspan class=\"s1\"\u003e🔍\u003c\/span\u003e Celestron 2” Dielectric Star Diagonal \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eReflectivity: Over 99% \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eOptical Quality: 58-layer dielectric coatings for maximum contrast and brightness \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eAlignment: Twist-lock holder ensures perfect centering for superior views \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eBest for: Anyone who wants to get the best performance out of their telescope \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eIf you want to maximize the potential of your optics without breaking the bank, upgrading to a dielectric star diagonal is one of the best investments you can make. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eWhy Choose the Celestron 2” Dielectric Star Diagonal with Twist-Lock? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eOver 99% reflectivity – Brighter, sharper views with minimal light loss. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003e58-layer dielectric coatings – Long-lasting performance that won’t degrade over time. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDiffraction-limited optical quality – Maintains the full resolution of your telescope. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eTwist-lock eyepiece holder – Perfect alignment without damaging your eyepieces. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eMultiple connection options – Works with both 2” focusers and SCT threads. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003ePrecision CNC-machined aluminum construction – Built for decades of use. \u003c\/li\u003e\n\u003cli class=\"p1\"\u003eGlare-threaded, flat-black interior – Eliminates reflections for maximum contrast. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eWhether you’re an avid observer, an astrophotographer, or simply looking to enhance the quality of your telescope’s views, the Celestron 2” Dielectric Star Diagonal with Twist-Lock is a game-changing upgrade. \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e🚀\u003c\/span\u003e Upgrade your viewing experience—order yours today and see the difference!\u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-specs-list\" class=\"table-open\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal size:\u003c\/td\u003e\n\u003ctd\u003e50.8mm (2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal type:\u003c\/td\u003e\n\u003ctd\u003eMirror\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass material:\u003c\/td\u003e\n\u003ctd\u003eBK7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings:\u003c\/td\u003e\n\u003ctd\u003eDielectric, 58 layers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflectivity:\u003c\/td\u003e\n\u003ctd\u003eOver 99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical quality:\u003c\/td\u003e\n\u003ctd\u003eDiffraction limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece holder:\u003c\/td\u003e\n\u003ctd\u003e2\", Twist-Lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\"-to-1.25\" Stepdown adapter:\u003c\/td\u003e\n\u003ctd\u003eIncluded, Twist-Lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression ring:\u003c\/td\u003e\n\u003ctd\u003eYes, dual rings for 2\" eyepiece holder and single ring for 1.25\" stepdown adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing construction:\u003c\/td\u003e\n\u003ctd\u003eMachined aluminum black anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrels:\u003c\/td\u003e\n\u003ctd\u003eComes with 2\" barrel (for connection to 2\" focusers) and SCT adapter (for connection to SCTs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel interior:\u003c\/td\u003e\n\u003ctd\u003eGlare threaded and painted flat black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThreads for filters:\u003c\/td\u003e\n\u003ctd\u003e2\" barrel and 1.25\" stepdown adapter have 2\" filter threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions:\u003c\/td\u003e\n\u003ctd\u003e152.4mm x 76.2mm x 101.6mm (6\" x 3\" x 4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight:\u003c\/td\u003e\n\u003ctd\u003e19 oz (538.6 g) (with stepdown adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalifornia Residents\u003c\/td\u003e\n\u003ctd class=\"cali-prop65-warning\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/products\/dielectric-star-diagonal-2-with-twist-lock?_pos=1\u0026amp;_sid=e761c55e9\u0026amp;_ss=r#\"\u003eView Proposition 65 Warning\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":40481994539081,"sku":"93573","price":259.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/products\/93573_twist-lock_dielectric_star_diagonal_2inch_02_570x380_3x_d166429f-bf88-409a-9a36-a1206e4ec9d0.jpg?v=1675380239"},{"product_id":"takahashi-1-25-prism-diagonal","title":"Takahashi 1.25” Prism Diagonal","description":"\u003cp\u003e\u003cspan\u003eThis premium 1.25\" Takahashi TAKSD1 compression ring prism star diagonal is the diagonal that Takahashi puts with all of their complete telescope systems - even those costing as much as $30,000.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis Takahashi TAKSD1 premium 1.25\" star diagonal uses a high quality prism instead of a mirror. The prism has 100% internal reflectivity and the entry and exit faces of the prism are multicoated for minimum light loss. The lightweight (only 3 ounce) diagonal will work with any 1.25\" accessory telescope other then a reflector.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe diagonal uses a non-marring molded compression ring to hold the eyepiece in place, rather than a set screw that can scratch the barrels of your eyepieces. The compression ring is tightened by a ribbed thread-on collet around the eyepiece holder. Rotate the collet in one direction and the compression ring tightens on the eyepiece to hold it firmly in place. A simple twist on the collet in the opposite direction loosens the compression ring's grip on the eyepiece. With a collet, instead of a thumbscrew as most diagonals use, there is no chance of losing the thumbscrew in the dark (along with the ability to hold your eyepieces safely in your diagonal).\u003c\/p\u003e\n\u003cp\u003eThe Takahashi TAKSD-1 is standard equipment with every Takahashi complete telescope package. Do you think that Takahashi would limit the performance of their telescope systems costing up to $30,000 with a less than exceptional star diagonal? Takahashi wanted the best 1.25\" diagonal for their telescopes. Should you settle for anything less than the best for your scope?\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e3 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":40536736596041,"sku":"TAKSD1","price":170.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/3349.jpg?v=1683534292"},{"product_id":"ioptron-1-25-dielectic-star-diagonal","title":"iOptron 1.25\" Dielectic Star Diagonal","description":"\u003cp data-start=\"305\" data-end=\"651\" class=\"\"\u003eThe iOptron 1.25\" dielectric star diagonal is an excellent upgrade for any refractor or catadioptric telescope that accepts standard 1.25\" accessories. Featuring \u003cstrong data-start=\"467\" data-end=\"509\"\u003emulti-layer dielectric mirror coatings\u003c\/strong\u003e, this diagonal delivers \u003cstrong data-start=\"534\" data-end=\"567\"\u003ehigh reflectivity (up to 99%)\u003c\/strong\u003e, sharper contrast, and excellent color fidelity across the entire visible spectrum.\u003c\/p\u003e\n\u003cp data-start=\"653\" data-end=\"840\" class=\"\"\u003eWhether you're observing planets, double stars, or deep-sky objects, this diagonal helps your telescope deliver the clean, bright images it’s capable of—without distortion or degradation.\u003c\/p\u003e\n\u003ch3 data-start=\"842\" data-end=\"881\" class=\"\"\u003eHigh Reflectivity Dielectric Mirror\u003c\/h3\u003e\n\u003cp data-start=\"883\" data-end=\"1177\" class=\"\"\u003eAt the heart of this diagonal is a \u003cstrong data-start=\"918\" data-end=\"947\"\u003eprecision-polished mirror\u003c\/strong\u003e coated with multiple dielectric layers. Unlike aluminum or silver coatings that degrade over time, \u003cstrong data-start=\"1047\" data-end=\"1101\"\u003edielectric coatings are extremely hard and durable\u003c\/strong\u003e, offering years of consistent performance without tarnishing or scratching.\u003c\/p\u003e\n\u003cp data-start=\"1179\" data-end=\"1333\" class=\"\"\u003eThe result? More light to your eye, higher contrast, and sharper detail—especially helpful when observing subtle features on the Moon, Jupiter, or Saturn.\u003c\/p\u003e\n\u003ch3 data-start=\"1335\" data-end=\"1384\" class=\"\"\u003eCNC Machined Body and Compression Ring Design\u003c\/h3\u003e\n\u003cp data-start=\"1386\" data-end=\"1656\" class=\"\"\u003eThe diagonal housing is made from \u003cstrong data-start=\"1420\" data-end=\"1445\"\u003eCNC-machined aluminum\u003c\/strong\u003e, with a black anodized finish that’s both durable and lightweight. The 1.25\" eyepiece holder uses a \u003cstrong data-start=\"1546\" data-end=\"1572\"\u003ebrass compression ring\u003c\/strong\u003e, which gently grips your eyepiece barrel without marring or scratching the surface.\u003c\/p\u003e\n\u003cp data-start=\"1658\" data-end=\"1846\" class=\"\"\u003eThe 1.25\" nosepiece also includes a removable barrel with standard filter threads, allowing you to use your favorite color or light pollution filters without modifying your diagonal setup.\u003c\/p\u003e\n\u003ch3 data-start=\"1848\" data-end=\"1897\" class=\"\"\u003eGreat for Visual Use with Refractors and SCTs\u003c\/h3\u003e\n\u003cp data-start=\"1899\" data-end=\"2008\" class=\"\"\u003eThis diagonal is a perfect visual companion for any telescope with a 1.25\" focuser or visual back, including:\u003c\/p\u003e\n\u003cul data-start=\"2010\" data-end=\"2191\"\u003e\n\u003cli data-start=\"2010\" data-end=\"2044\" class=\"\"\u003e\n\u003cp data-start=\"2012\" data-end=\"2044\" class=\"\"\u003eRefractors with 1.25\" focusers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2045\" data-end=\"2104\" class=\"\"\u003e\n\u003cp data-start=\"2047\" data-end=\"2104\" class=\"\"\u003eSchmidt-Cassegrain telescopes using a 1.25\" visual back\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2105\" data-end=\"2129\" class=\"\"\u003e\n\u003cp data-start=\"2107\" data-end=\"2129\" class=\"\"\u003eMaksutov-Cassegrains\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2130\" data-end=\"2191\" class=\"\"\u003e\n\u003cp data-start=\"2132\" data-end=\"2191\" class=\"\"\u003eShort-tube and spotting-style scopes with 90° viewing needs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2193\" data-end=\"2294\" class=\"\"\u003eIt provides a \u003cstrong data-start=\"2207\" data-end=\"2228\"\u003e90° viewing angle\u003c\/strong\u003e, ideal for high-altitude targets or comfortable seated observing.\u003c\/p\u003e\n\u003ch3 data-start=\"2296\" data-end=\"2320\" class=\"\"\u003eIncluded Accessories\u003c\/h3\u003e\n\u003cul data-start=\"2322\" data-end=\"2486\"\u003e\n\u003cli data-start=\"2322\" data-end=\"2363\" class=\"\"\u003e\n\u003cp data-start=\"2324\" data-end=\"2363\" class=\"\"\u003e1.25\" dielectric mirror star diagonal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2364\" data-end=\"2411\" class=\"\"\u003e\n\u003cp data-start=\"2366\" data-end=\"2411\" class=\"\"\u003eDust caps for nosepiece and eyepiece holder\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2412\" data-end=\"2438\" class=\"\"\u003e\n\u003cp data-start=\"2414\" data-end=\"2438\" class=\"\"\u003eBrass compression ring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2439\" data-end=\"2468\" class=\"\"\u003e\n\u003cp data-start=\"2441\" data-end=\"2468\" class=\"\"\u003eFilter-threaded nosepiece\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2469\" data-end=\"2486\" class=\"\"\u003e\n\u003cp data-start=\"2471\" data-end=\"2486\" class=\"\"\u003eBoxed packaging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2488\" data-end=\"2506\" class=\"\"\u003eFinal Thoughts\u003c\/h3\u003e\n\u003cp data-start=\"2508\" data-end=\"2814\" class=\"\"\u003eThe iOptron 1.25\" dielectric star diagonal is a dependable optical upgrade for astronomers who want \u003cstrong data-start=\"2608\" data-end=\"2654\"\u003ebetter image brightness, improved contrast\u003c\/strong\u003e, and long-lasting durability. It’s a practical enhancement over stock prism or lower-end mirror diagonals, and it’s built to handle years of regular observing.\u003c\/p\u003e\n\u003cp data-start=\"2816\" data-end=\"2946\" class=\"\"\u003eWhether you're chasing planetary detail or scanning open clusters, this diagonal helps your scope reach its full visual potential.\u003c\/p\u003e\n\u003chr data-start=\"2948\" data-end=\"2951\" class=\"\"\u003e\n\u003cp data-start=\"2953\" data-end=\"3155\" class=\"\"\u003e\u003cstrong data-start=\"2953\" data-end=\"2971\"\u003eObserving Tip:\u003c\/strong\u003e\u003cbr data-start=\"2971\" data-end=\"2974\"\u003eFor best performance, pair your dielectric diagonal with fully multi-coated eyepieces. You’ll maximize throughput, improve contrast, and get the most from your telescope’s aperture.\u003c\/p\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":41753872629833,"sku":"6231","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/6231-2T.jpg?v=1726691493"},{"product_id":"sky-rover-1-25-99-reflectivity-dielectric-mirror-diagonal","title":"Sky Rover 1.25\" 99% Reflectivity Dielectric Mirror Diagonal","description":"\u003cp\u003eThe Sky Rover 1.25\" diagonal has state-of-the-art \u003cem\u003e46-layer \u003c\/em\u003edielectric mirror coatings for a full 99% reflectivity. This is markedly higher reflectivity than the 88% of a conventional aluminum diagonal or the 96-97% of an easily-tarnished silver diagonal. The result? Extremely faint deep space objects at your scope's performance limits become more visible, changing your viewing from \"I guess I see it\" to \"it's really there!\"\u003c\/p\u003e\n\u003cp\u003eThe mirror housing is precision-machined from solid aluminum, rather than simply flimsy Bakelite plastic or a sheet metal stamping, as you'll find with ordinary diagonals. A rigid machined metal backplate with stainless steel hardware holds the mirror in perfect optical alignment in the machined body. The interior of the body is anodized an antireflective matte black. The focuser-side barrel is also anodized antireflective matte black, and is internally antireflection threaded for even higher contrast. The barrel is threaded to accept standard 1.25\" filters.\u003c\/p\u003e\n\u003cp\u003eThe 1.25\" eyepiece holder uses a non-marring soft brass compression ring to clamp eyepieces in place, rather than a thumbscrew that can scratch an eyepiece barrel by tightening down on it directly.\u003c\/p\u003e\n\u003cp\u003eA shallow slanted groove cut into the outside of the focuser-side barrel engages with the scope's visual back or eyepiece holder thumbscrew to act as a safety stop. This keeps the diagonal from falling should the scope's thumbscrew loosen slightly from cold or use. Dust covers are provided for both sides of the diagonal.\u003c\/p\u003e\n\u003cp\u003eThis premium 1.25\" diagonal works with virtually any Schmidt-Cassegrain, Maksutov-Cassegrain, or refractor that uses a 1.25\" star diagonal,. It will provide a visible improvement on deep space objects over the scope's factory-supplied diagonal. The newly designed body of the Sky Rover diagonal is more compact than previous diagonals. This essentially eliminates any possibility of the diagonal bumping into the drive base of a short fork arm catadioptric when the scope is pointed at the zenith. This diagonal\u003cem\u003e \u003c\/em\u003egives you all the visual performance your scope is capable of delivering, at a price that's very affordable.\u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable class=\"table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5.5 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky Rover","offers":[{"title":"Default Title","offer_id":54787737223241,"sku":"SR1D","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/1679554847743-ckt-_1.webp?v=1761059879"},{"product_id":"sky-rover-2-99-reflectivity-dielectric-mirror-diagonal-for-refractors","title":"Sky Rover 2\" 99% Reflectivity Dielectric Mirror Diagonal For Refractors","description":"\u003cp\u003eThis Sky Rover 2” dielectric mirror-type star diagonal is an outstanding value. At this low price, if there ever was a bargain in astronomy, this is it.\u003c\/p\u003e\n\u003cp\u003eThis 2” Sky Rover first-surface mirror star diagonal has state-of-the-art 46-layer dielectric mirror coatings for a full 99% reflectivity, higher than the 88% of a conventional aluminum diagonal or the 96-97% of an easily-tarnished silver diagonal.\u003c\/p\u003e\n\u003cp\u003eThe durable ion-deposited dielectric coatings on the mirror’s finely-polished 10mm thick 1\/10th wave BK7 optical glass substrate also provide higher contrast and resolution during critical planetary, lunar, and binary star observations.\u003c\/p\u003e\n\u003cp\u003eThe supplied 1.25” eyepiece adapter uses a compression ring to hold eyepieces in place. The scope-side barrel of the 1.25” adapter has a subtle slanted groove to keep it from accidentally slipping out of the 2” diagonal. Dust covers are provided for the 1.25” adapter and the diagonal’s 2” barrel.\u003c\/p\u003e\n\u003cp\u003eThe interior of the diagonal body and the inside of the focuser-side barrel are treated with light absorbing materials. The focuser-side barrel is also internally anti-reflection threaded for even higher contrast. The barrel is threaded to accept standard 2” filters.\u003c\/p\u003e\n\u003cp\u003eA subtle slanted groove cut into the outside of the focuser-side 2” barrel engages with your telescope’s focuser thumbscrew to act as a safety stop. This keeps the diagonal from falling should the scope’s thumbscrew loosen slightly from cold or use.\u003c\/p\u003e\n\u003cp\u003eThis diagonal is a visible improvement over the conventional 2\" diagonal provided with many refractors capable of using 2” optics. It can also be used with a Schmidt-Cassegrain or Maksutov-Cassegrain telescope with a suitable adapter, such as the #7785C. It is an absolutely premium 2” 99% reflectivity dielectric self-centering star diagonal at a fraction the price of competitive models with equivalent performance and build quality. The same performance, for as little as half the price. If there ever was a bargain in astronomy, this is it.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eTech Details:\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e17 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky Rover","offers":[{"title":"Default Title","offer_id":54787740729417,"sku":"SR2D","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/1_0dbf93d3-2f36-4628-9af1-438c19fdd332.webp?v=1761060331"},{"product_id":"sky-rover-2-99-reflectivity-dielectric-mirror-diagonal-for-refractors-neaf-demo","title":"Sky Rover 2\" 99% Reflectivity Dielectric Mirror Diagonal For Refractors NEAF DEMO","description":"\u003cp\u003eThis Sky Rover 2” dielectric mirror-type star diagonal is an outstanding value. At this low price, if there ever was a bargain in astronomy, this is it.\u003c\/p\u003e\n\u003cp\u003eThis 2” Sky Rover first-surface mirror star diagonal has state-of-the-art 46-layer dielectric mirror coatings for a full 99% reflectivity, higher than the 88% of a conventional aluminum diagonal or the 96-97% of an easily-tarnished silver diagonal.\u003c\/p\u003e\n\u003cp\u003eThe durable ion-deposited dielectric coatings on the mirror’s finely-polished 10mm thick 1\/10th wave BK7 optical glass substrate also provide higher contrast and resolution during critical planetary, lunar, and binary star observations.\u003c\/p\u003e\n\u003cp\u003eThe supplied 1.25” eyepiece adapter uses a compression ring to hold eyepieces in place. The scope-side barrel of the 1.25” adapter has a subtle slanted groove to keep it from accidentally slipping out of the 2” diagonal. Dust covers are provided for the 1.25” adapter and the diagonal’s 2” barrel.\u003c\/p\u003e\n\u003cp\u003eThe interior of the diagonal body and the inside of the focuser-side barrel are treated with light absorbing materials. The focuser-side barrel is also internally anti-reflection threaded for even higher contrast. The barrel is threaded to accept standard 2” filters.\u003c\/p\u003e\n\u003cp\u003eA subtle slanted groove cut into the outside of the focuser-side 2” barrel engages with your telescope’s focuser thumbscrew to act as a safety stop. This keeps the diagonal from falling should the scope’s thumbscrew loosen slightly from cold or use.\u003c\/p\u003e\n\u003cp\u003eThis diagonal is a visible improvement over the conventional 2\" diagonal provided with many refractors capable of using 2” optics. It can also be used with a Schmidt-Cassegrain or Maksutov-Cassegrain telescope with a suitable adapter, such as the #7785C. It is an absolutely premium 2” 99% reflectivity dielectric self-centering star diagonal at a fraction the price of competitive models with equivalent performance and build quality. The same performance, for as little as half the price. If there ever was a bargain in astronomy, this is it.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eTech Details: \u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e17 oz.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sky Rover","offers":[{"title":"Default Title","offer_id":55637383315529,"sku":"SR2DD","price":110.46,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/7974\/9961\/files\/1_0dbf93d3-2f36-4628-9af1-438c19fdd332.webp?v=1761060331"}],"url":"https:\/\/astronomics.com\/collections\/diagonals-prisms.oembed?page=2","provider":"Astronomics","version":"1.0","type":"link"}