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Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes

Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes

Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes

B&H # CEDM2S MFR # 93527
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Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes

Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes

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Product Highlights

  • Upright, Laterally-Reversed Images
  • Fits Catadioptric 2"-18 Rear Threads
  • Starbright XLT Coatings
Reviews 8 Q&A
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  • 1Description

The Celestron 90-Degree Mirror Diagonal (2") is a star diagonal with StarBright XLT coating, for use with Schmidt-Cassegrain telescopes with the 2"-18 threaded device.

Star diagonal is the term commonly associated with 90° mirror diagonals such as this, which let you view objects that are at a 90° angle from the direction the telescope is pointing.  This allows quite comfortable viewing when the telescope is at or near the zenith (directly overhead), and is fairly comfortable when observing terrestrial imagery as well-albeit a bit unorthodox at first.

Celestron's erect image diagonals are Amici prism designs, meaning that images are upright and laterally correct.  This design, however, instead renders images which are laterally reversed but are brighter than erect image diagonals.  This diagonal is used with 2" focusers and can be used with either 2.00" or 1.25" eyepieces, thanks to the included adapter which reduces the eyepiece barrel diameter to accept the smaller size.  

StarBright XLT coating system offers multi-layer enhanced mirror coatings, which shift the peak reflectance to the center of the visible spectrum. The coating process uses state-of-the-art thin film vacuum deposition technology. To ensure consistent optical coatings of the highest quality the process is tightly monitored and controlled by highly trained coating technicians.
Improved attachment design features a brass clamping ring which does not mar, and provides a more secure connection.
Accepts 2" filters for astronomical applications.
UPC: 050234935272
In the Box
Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes
  • 2" to 1.25" Eyepiece Barrel Diameter Reducer
  • Padded Aluminum Case
  • Dust Caps
  • 1-Year Warranty
    • Table of Contents
    • 1Description
    Weight Body: 0.88 lb (400g)
    Eyepiece Adapter: 0.19 lb (85g)
    Packaging Info
    Package Weight 2.9 lb
    Box Dimensions (LxWxH) 8.3 x 7.3 x 7.1"
    90-Degree Mirror Diagonal (2") for SCT Scopes is rated 5.0 out of 5 by 8.
    Rated 5 out of 5 by from Great 2-inch diagonal at a reasonable price I bought the Celestron Starbright XLT 2-inch diagonal for Schmidt-Cassegrain telescopes to use with my new Celestron CPC 1100 SCT. It has the same coating on its mirror that Celestron uses for its telescope mirrors and corrector plates. It's fit and finish are excellent, and it can be used with 1.25-inch eyepieces as well. Both 1.25- and 2-inch eyepieces are held snugly with compression rings instead of the finish-marring screws used in less expensive models. It's very easy to use and holds all my eyepieces very rigidly. Simply a great diagonal at a very reasonable price! If you have a SCT, you need this diagonal!
    Date published: 2015-11-16
    Rated 5 out of 5 by from Great upgrade If you have a SCT scope, I do recommend you upgrade the diagonal to a better one than the one included with the scope. This one is it.
    Date published: 2015-05-25
    Rated 5 out of 5 by from Well made accessory. This is a well-constructed accessory, which will let you use larger 2 eyepieces. It also comes with a 1.25 adapter for the smaller eyepieces. It comes in an aluminum, foam-lined case as well. One minor comment: Be aware that you may not be able to use your finder scope after you install this huge diagonal! I need to replace my finder scope on my C6-SGT telescope with an angled 90-degree one.
    Date published: 2010-11-15
    Rated 5 out of 5 by from Big, Sturdy and nice Diagonal. The first impression when I saw this diagonal was: Wow this is a monster Diagonal !.It supports 1.25 and 2 in barrel, it comes with a alluminum case, is a must have if you are gonna use 2 in barrell eyepieces!. Ill use it all the time with my 8 SCT. Thanks to the B&H team for the great job they do!
    Date published: 2017-06-29
    Rated 5 out of 5 by from Outstanding Product This product alowed me to have a greater field of view but more importantly made my camera and lense solid as a rock to the scope
    Date published: 2010-05-26
    Rated 5 out of 5 by from Excellent Product High quality build and fitment. Good price relative to comparable high resolution diagonals.
    Date published: 2015-09-21
    Rated 5 out of 5 by from Great Upgrade Best upgrade to my scope so far.
    Date published: 2015-01-22
    Rated 5 out of 5 by from I would buy again. I would buy again.
    Date published: 2017-11-08
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