Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes
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.
| Weight |
Body: 0.88 lb (400g) Eyepiece Adapter: 0.19 lb (85g) |
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REVIEWS
Reviewed by 2 customers
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Displaying reviews 1-2
Pros
- Easy To Use
- Good Padding
- Great Optics
- Strong Construction
- Widely Compatible Adapter
Cons
Best Uses
- Astronomy
Comments about Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes:
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.
- Was this a gift?:
- No
Pros
- Easy To Use
- Good Padding
- Great Optics
- Really solid
- Strong Construction
- Widely Compatible Adapter
Cons
Best Uses
- Astronomy
- Astrophotography
Comments about Celestron 90-Degree Mirror Diagonal (2") for SCT Scopes:
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
Displaying reviews 1-2
Cleaning/Anti-Fog Agents
- Price: $8.95
Filters
- Price: $78.29
What's in the Box
- 2" to 1.25" Eyepiece Barrel Diameter Reducer
- Padded Aluminum Case
- Dust Caps
- 1-Year Warranty
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