{"title":"Diagonals","description":"\u003cspan style=\"display: none;\"\u003ehide::live::text\u003c\/span\u003e","products":[{"product_id":"dielectric-star-diagonal-1-25-with-twist-lock","title":"Dielectric Star Diagonal, 1.25” with Twist-Lock","description":"\u003cp\u003eEnsure maximum light transmission without loss of optical quality with the Celestron Dielectric Star Diagonal, 1.25” with Twist-Lock. Upgrade your existing star diagonal to this premium one and enjoy brighter, sharper images without replacing your telescope.\u003c\/p\u003e\n\u003cp\u003eThis star diagonal reflects the telescope’s light path 90° to provide a more comfortable viewing angle. In addition, the glass has 58 layers of dielectric coatings, which provide an over 99% reflective surface, delivering the maximum amount of light to the eyepiece. The twist-lock eyepiece holder secures any 1.25” eyepieces while keeping them centered in the diagonal, thus providing best opto-mechanical alignment between the telescope and eyepiece. Unlike traditional thumb screws, the twist-lock cannot scratch or engrave the barrel of your eyepieces. The twist-lock has an integrated 1.25” barrel stop that prevents 1.25” accessories with long barrels from damaging the mirror.\u003c\/p\u003e\n\u003cp\u003eAll the diagonal’s mechanical parts are made of machined black anodized aluminum, except the twist lock rings, which are orange anodized for visibility. The interior of the barrel is glare threaded and painted flat black to prevent glare. With all its features and these high-end finishes, the Celestron Dielectric Star Diagonal, 1.25” with Twist-Lock is one of the highest quality 1.25\" star diagonals that Celestron has ever offered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Star Diagonals vs Dielectric Star Diagonal\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe key specifications for a star diagonal are its reflectivity and its optical quality. This diagonal delivers top performance in both categories, with an over 99% reflective mirror and diffraction-limited optical quality. This ensures that virtually all the light collected by the telescope will reach the eyepiece without the diagonal affecting optical performance. Using a lower quality star diagonal can both dim the view and degrade optical quality. You can enjoy better views from your telescope by simply swapping out its diagonal for a premium one, like the Celestron Dielectric Star Diagonal.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47324040036671,"sku":"93571","price":56.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/9840\/0063\/products\/93571_1.25in_Twist-Lock_Dielectric_Star_Diagonal_01.jpg?v=1700597891"},{"product_id":"dielectric-star-diagonal-2-with-twist-lock","title":"Dielectric Star Diagonal, 2” with Twist-Lock","description":"\u003cp\u003eEnsure maximum light transmission without loss of optical quality with the Celestron Dielectric Star Diagonal, 2” with Twist-Lock. Upgrade your existing star diagonal to this premium one and enjoy brighter, sharper images without purchasing an entirely new telescope. \u003c\/p\u003e\n\u003cp\u003eThis star diagonal reflects the telescope’s light path 90° to provide a more comfortable viewing angle. In addition, the glass has 58 layers of dielectric coatings, which provide an over 99% reflective surface, delivering the maximum amount of light to the eyepiece. This 2” star diagonal has the added benefit of allowing you to use larger 2” eyepieces with your telescope, providing a wider field of view, or standard 1.25” eyepieces with the stepdown adapter. \u003c\/p\u003e\n\u003cp\u003eThe twist-lock eyepiece holder secures eyepieces while keeping them centered in the diagonal, thus providing best opto-mechanical alignment between the telescope and eyepiece. Unlike traditional thumb screws, the twist-lock cannot scratch or engrave the barrel of your eyepieces. The diagonal has an integrated 2” barrel stop that prevents 2” accessories with long barrels from damaging the mirror. \u003c\/p\u003e\n\u003cp\u003eAll the diagonal’s mechanical parts are made of machined black anodized aluminum, except the twist lock rings, which are orange anodized for visibility. The interior of the Schmidt-Cassegrain adapter and 2” barrel are glare threaded and painted flat black to prevent glare. With all its features and these high-end finishes, the Celestron Dielectric Star Diagonal, 2” with Twist-Lock is one of the highest quality 2\" star diagonals that Celestron has ever offered.\u003c\/p\u003e\n\u003cp\u003eThis diagonal also comes with two interchangeable barrels to provide flexibility in connecting the diagonal to a wide variety of telescopes without the need for additional adapters. For telescopes, like refractors, which accept 2” barrels in their focuser, a standard 2” barrel is included. For Schmidt-Cassegrains (SCTs) that use a threaded connection to the focuser, a barrel with SCT threads is included. Both barrels thread onto the diagonal housing, providing a secure connection to the diagonal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Star Diagonals vs Dielectric Star Diagonal \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe key specifications for a star diagonal are its reflectivity and its optical quality. This diagonal delivers top performance in both categories, with an over 99% reflective mirror and diffraction-limited optical quality. This ensures that virtually all the light collected by the telescope will reach the eyepiece without the diagonal affecting optical performance. Using a lower quality star diagonal can both dim the view and degrade optical quality. You can enjoy better views from your telescope by simply swapping out its diagonal for a premium one, like the Celestron Dielectric Star Diagonal.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47324040560959,"sku":"93573","price":90.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/9840\/0063\/products\/93573_Twist-Lock_Dielectric_Star_Diagonal_2inch_01.jpg?v=1700597910"},{"product_id":"star-diagonal-125in","title":"Star Diagonal - 1.25\"","description":"\u003cp\u003eThe Celestron 1.25” Star Diagonal slides into the focuser (1.25”) of your refractor or catadioptric telescope and accepts standard 1.25” eyepieces, allowing you to view objects more comfortably. A diagonal that is angled at 90º helps avoid neck strain when looking through through the eyepiece.\u003c\/p\u003e\n\u003cp\u003ePlease note that a 90º diagonal will display images that are right side up, but left to right orientation will be reversed.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47324268855615,"sku":"94115-A","price":11.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/9840\/0063\/products\/94115-a_diagonal_direct_02.jpg?v=1700602244"},{"product_id":"45-degree-erect-image-diagonal","title":"45-Degree Erect Image Diagonal","description":"\u003cp\u003eDid you know that most telescopes work well for daytime viewing as well as for astronomy? If you have a refractor or a catadioptric telescope (the Schmidt-Cassegrain is the most popular example), and you would like to use it for terrestrial observations, the most useful additional accessory you can buy is an erect-image diagonal.\u003c\/p\u003e\n\u003cp\u003eIf you look through your telescope with the standard mirror or star diagonal installed, you will notice that objects may be either upside down, flipped so that you see a mirror image, or a combination of the two. This is fine for observations of celestial objects, but it can be a little confusing when you are trying to track a boat as it moves through the water, or an eagle as he flies towards his perch.\u003c\/p\u003e\n\u003cp\u003eLuckily, this is an easy problem to correct. Simply remove the standard diagonal from the telescope’s focuser or visual back, and install the Celestron 45º Erect Image Diagonal. Now, when you insert an eyepiece, objects will be right side up and left-to-right correct. The 45º angle of this Amici prism diagonal is very comfortable for daytime observations, where the telescope is often in a horizontal position.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePlease Note:\u003c\/em\u003e Adding an erect-image diagonal to a Newtonian reflector will not result in images that are right side up and left-to-right correct. The optical design of a Newtonian will always produce images that are rotationally off in orientation. This does not mean that you can’t use a Newtonian reflector during the day, it just means that you have to get used to objects oriented in unrealistic positions.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47324269183295,"sku":"94112-A","price":11.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/9840\/0063\/products\/94112-a_diagonal_direct_01_1.jpg?v=1700602247"},{"product_id":"mirror-diagonal-with-xlt-coatings-2in","title":"Mirror Diagonal with XLT Coatings - 2\"","description":"\u003cp\u003eThere are few telescope accessories that work as hard or matter as much as a diagonal! An integral part of the optical chain, a good diagonal can make a big difference in the quality of the image you see. A 2” diagonal is required if you want to use 2” eyepieces when observing with your telescope. The larger 2” barrel allows you to see a bigger percentage of the telescope’s light cone, which works wonders for capturing faint deep sky objects with low surface brightness.\u003c\/p\u003e\n\u003cp\u003eThe Celestron 2” Mirror Diagonal was built for superior performance. The housing is machined with precision instruments to make sure the optics stay perfectly aligned. The diagonal’s mirror is tested with an interferometer, and is guaranteed to be 1\/10 wave or better. The mirror’s surface is covered with the same high performance XLT coatings used on Celestron’s best telescopes, and the result is a sharp, bright image that will satisfy the most discriminating amateur astronomer.\u003c\/p\u003e\n\u003cp\u003eThis 2” diagonal threads securely to the rear cell of standard Schmidt-Cassegrain telescopes. To take advantage of the XLT Diagonal’s extra light throughput, insert a 2” eyepiece into the barrel. If you want to use 1.25” eyepieces, slide the included 2” to 1.25” adapter into the eyepiece barrel and secure it with the thumbscrew. When you’re not observing, store your diagonal in the included aluminum case for protection.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47324270231871,"sku":"93527","price":71.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/9840\/0063\/products\/93527-2-inch_XLT_Diagonal.jpg?v=1700602251"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/9840\/0063\/collections\/Diagonals_Page_1200x310_470d011e-f65f-4f8d-beb7-d76d081dc213.jpg?v=1700611861","url":"https:\/\/employee-store.celestron.com\/collections\/diagonals.oembed","provider":"Celestron Employee Store","version":"1.0","type":"link"}