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This Astromania star diagonal has a 1.25" metal barrel. The chrome finish not only looks good, but is also practical, as the star diagonal always remains firmly attached to the focuser. The clamping screws lock the barrel firmly in place without scoring the nosepiece, as is the case with many cheaper products. In short - this barrel will keep your star diagonal in condition for virtually forever.The mirror has had everything that is possible optimised, it is the link between your eye and the telescope - and is hence just as important.Sometimes you do not want to have to re-install a filter every time you use a new eyepiece. Perhaps you might want to observe the Moon today with a range of eyepieces - but with the same filter? That is also possible due to the filter thread provided in the star diagonal.
Durable And Sturdy
The two mirror tubes are made of metal to make the structure stronger and more durable. Protective coating on the mirror to ensure a long life.
Two Eyepiece Holder Thumbscrew
There are two screws on each side of the eyepiece barrel to make the structure more stable and durable. The two screws are clamping screws, which is more convenient to use.
90 Degree Diagonal Mirror
When using a telescope, viewing from a comfortable Angle will make the experience better. For more comfortable overhead viewing through refractor and Cassegrain type telescopes.
Long-time Use
- Protective coating on the mirror to ensure a long life. The high quality of the mirror makes the image seen clearer and brighter. This wide 90 degree angle makes you view correct image from telescope stands.
- Type of Build: Diagonal Mirror
The advantages in a nutshell:
Easy to use
Simply insert the diagonal mirror into the 1.25 " telescope; Fit for 1.25” telescope eyepiece and telescope focuser , 1.25" Star Diagonal Mirror accepts 1.25" eyepieces filters and other accessories with a 1.25” insert barrel.
- Provides a comfortable 90 degree view from your refractor
- The material: metal and plastic
- Standard 1.25 " diameter fits for 1.25" eyepiece and telescope
- Excellent quality fully diagonal
- High glossy finish appearance
- High optical lens transparency
G
Reviewed in the United States on February 22, 2025
I purchased this 90° mirror for a telescope that was packaged with a 45° prism. This makes life so much easier on the eyes when viewing the night sky. Let's get those views of the Planet Parade! *0/*
Marie
Reviewed in the United States on September 21, 2024
Arrived in a well padded package within the estimated shipping dates. Okay, my mistake; this mirror based eye piece doesn't correct the left/right or up/down perspective in a telescope. Only a prism based eye-piece will correct perspective. By the way just FYI, the 90-degree design just makes looking into the eye piece easier; you can stand upright and look vertically down into the eye piece, instead of crouching down to lookin horizontally straight into the eye piece.
John Skelly ii
Reviewed in the United States on May 19, 2024
Just got it delivered today, and put it on my telescope and will not focus at all. Can’t even look at the moon without it being just a fuzzy blob of cheese. Cheap things aren’t always great, and great things aren’t always cheap.
ieatbroccoli
Reviewed in the United States on March 5, 2024
great improvement over the 45 degree that came with my telescope
Xonic
Reviewed in the United States on July 7, 2022
Good quality for the price. Gets the job done with smaller budget telescopes. Budget astronomer approved. 🙂👍
John Bridges
Reviewed in the United States on September 2, 2021
I have to say that the difference between original part and aftermarket part is night and day. I tested this for terrestrial viewing and the image was sharper, cleaner, and brighter.
Serge Prescotte
Reviewed in Canada on August 7, 2018
Very well packed. Great job for the price.
WTrainer
Reviewed in Canada on September 15, 2017
Great shipping based on the set timing. The diagonal is well worth it and value is terrific. Thank you
Randall
Reviewed in the United States on December 28, 2017
It says it’s a 90deg. But doesn’t mention magnification? It throw focus off when switching lenses
Nick
Reviewed in the United States on June 26, 2016
When I picked it up I was impressed at its weight. It has a very solid feel. The mirror is very clean, and when I installed the diagonal in my scope and tested it out on some distant trees I could focus clearly, no distortion. The thumbscrews on the eyepiece receiver are big and easy to grip. The plastic on the receiver tube seems a little thin, and it makes me kind of nervous about stripping the screw holes, but only gentle pressure is necessary to hold the eyepiece securely in place. All in all, it is a good basic diagonal. Looking forward to the next clear night.
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