Dismiss Notice
New Cookie Policy
On May 24, 2018, we published revised versions of our Terms and Rules and Cookie Policy. Your use of AstronomyConnect.com’s services is subject to these revised terms.

View the Latest Diagonals & Prism Reviews

Item
Submitted By
GSO Chrome Barrel from 2
GSO Chrome Barrel from 2" GSO Refractor Diagonals
5.0
Excellent Product
Good construction.
GSO Chrome Barrel from 2
GSO Chrome Barrel from 2" GSO Refractor Diagonals
5.0
GSO Chrome Barrel
High quality and works right off the bat. If you need a 2" nose piece, this is it. These are critical, as no one besides GSO supplies these.
Baader 2
Baader 2" Clicklock Mirror Star Diagonal # MAX-2C 2956100
5.0
Fantastic Optical Quality and Build
Absolutely THE best Diagonal out there. Beats all the others hands down. No shortcuts here, just a high quality piece that would fit that "must have" upgrade. Works perfectly on my C9.25 SCT and my 4.3" Refractor. No light falloff, and clear across t...
GSO Chrome Barrel from 2
GSO Chrome Barrel from 2" GSO Refractor Diagonals
4.0
Worked to transform my Celestron #93519
Used this with GSO Crayford Focuser for SCT
Baader 2
Baader 2" Clicklock Mirror Star Diagonal # MAX-2C 2956100
5.0
The best I've ever used
The Baader Clicklock is by far the best barrel retaining method in the industry. Very strong and easy to use, a quality component. If only it came in black.
GSO 2
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for Refractors
5.0
This is a great diagonal
I bought one of these a couple years ago for my 8" SCT and when I needed a 2" diagonal for my 100mm refractor it was a no brainier to get another. The best bargain in 2" diagonals.
GSO Chrome Barrel from 2
GSO Chrome Barrel from 2" GSO Refractor Diagonals
5.0
Increases usability of GSO Diagonals!
Like many others, bought this adapter to use my GSO SCT 2" Diagonal in 2" refractor focuser. Thank you, Agena!
GSO Chrome Barrel from 2
GSO Chrome Barrel from 2" GSO Refractor Diagonals
5.0
Good price
I used this to mount a off axis guider in a 2" crayford focuser, it does the job perfectly and Agena always has what I need at a lower cost than the competitors, I recommend Agena astro to all my friends
William Optics SCT Thread Adapter for 2
William Optics SCT Thread Adapter for 2" Diagonal
5.0
Well Designed...........
Works very well for what it was designed to do.........
Meade #931 Hybrid 0.965
Meade #931 Hybrid 0.965"-to-1.25" 45-deg Erect-Image Prism Diagonal # 07208
4.0
Meade #931 diagonal
The product is wonderful, we are very pleased.
William Optics 2
William Optics 2" 45-deg Erecting Prism Diagonal # D-EP2
5.0
William Optics 2" 45-deg Erecting Prism
Great product(s) and enjoy very much doing business here. Thanks.
Meade #931 Hybrid 0.965
Meade #931 Hybrid 0.965"-to-1.25" 45-deg Erect-Image Prism Diagonal # 07208
5.0
It worked for us
It does the job I needed it to do. I think the optics could have been higher quality but it is very nice not to have to lie on the ground to get to look through the telescope.
GSO Chrome Barrel from 2
GSO Chrome Barrel from 2" GSO Refractor Diagonals
5.0
Easy conversion fron SCT to Refractor
I recently purchased a WO erect image 2 inch diagonal for my refractor from Agena. The WO threads also fit my optics pro diagonals but not my orion 2 inch sct diagonals. So I ordered a GSO chrome barrel and found they fit perfectly. The quality is ex...
GSO 2
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for SCTs
5.0
Great Diagonal
This is a great diagonal. I use it with my Celestron C8 SCT. The optical quality and build are very good, and it is nice to use 2 inch eyepieces for wide views. The compression ring does not scratch my eyepieces either.
GSO 2
GSO 2" 90-deg Mirror Diagonal for Refractors
4.0
Good Diagonal
This is a whopper of a diagonal. It's durable enough to have withstood a tragic fall of about two feet onto concrete without any damage or misalignment, and it feels like it. Big, heavy, but excellent views. Unless you're using a really wide view ...
GSO 2
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for SCTs
4.0
More than good enough for any scope
I originally bought one of these for my C8. I tried it with my William Optics 66mm refractor, and immediately ordered a second one. I'm not sure how any diagonal could be any better. Very solidly made, and very versatile.
GSO 2
GSO 2" 90-deg Mirror Diagonal for SCTs
5.0
Best deal in diagonals
Happy with the quality of GSO products. Threaded body allows additional barrels to be used making the product interchangeable between SCT and refractors.
William Optics SCT Thread Adapter for 2
William Optics SCT Thread Adapter for 2" Diagonal
5.0
Excellent adapter
I purchased this adapter for my William Optics diagonal. Now, I can use this diagonal with my Celestron SCT or I screw back the slip adapter to use it on my Stellarvue refractor. What a convenience!!
William Optics SCT Thread Adapter for 2
William Optics SCT Thread Adapter for 2" Diagonal
5.0
Excellent adapter
This excellent adapter allows me to use my 2" William Optics diagonal with my Celestron SCT or I screw back the slip adapter to use my diagonal with my Stellarvue refractor. Is like having two diagonals in one. Thanks Agena for providing great produc...
William Optics 2
William Optics 2" 45-deg Erecting Prism Diagonal # D-EP2
5.0
William Optics Diagonal
I needed a 2" erecting diagonal for my 8" Meade LX-200 SCT type telescope for terrestrial viewing so that the image is not inverted left-to-right. But Meade does not make an erecting type diagonal for 2" eyepieces (only for 1.25" eyepieces). However,...