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View the Latest Diagonals & Prism Reviews
Item
Submitted By
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for SCTs
GSO 2" Mirror Diagonal (99% Dielectric)
Superb diagonal - meets and exceeds my intermediate level observing requirements. HIGHEST QUALITY - excellent workmanship and materials, fit and finish. WORKS SUPERBLY. Highly recommended for anyone who needs a really good 2" diagonal. MP Ballst...
Superb diagonal - meets and exceeds my intermediate level observing requirements. HIGHEST QUALITY - excellent workmanship and materials, fit and finish. WORKS SUPERBLY. Highly recommended for anyone who needs a really good 2" diagonal. MP Ballst...
Jul 12, 2018
GSO 2" 90-deg Mirror Diagonal for Refractors
2" GSO 90* Mirror Diagonal
Great deal for price. Using on my 102mm, F/6.5 RFT refractor with a GSO 30mm Superview eyepiece. Love it.
Great deal for price. Using on my 102mm, F/6.5 RFT refractor with a GSO 30mm Superview eyepiece. Love it.
William Optics 2" 99% Dura Bright RotoLock Mirror Diagonal for Refractors #...
Dignified way to attach accessories
I have a lot of stuff stacked on the back of my SCT and the RotoLock is the most secure feeling part of it all. This is attached to the back of the SCT with the other accessories on top of it so I can still swing to dec 0. This diagonal sits much clo...
I have a lot of stuff stacked on the back of my SCT and the RotoLock is the most secure feeling part of it all. This is attached to the back of the SCT with the other accessories on top of it so I can still swing to dec 0. This diagonal sits much clo...
GSO 1.25" 90-deg 99% Dielectric Mirror Diagonal with Compression Ring
Not bad at all :)
I am quite satisfied with this diagonal, which is clearly one class over the standard "kit" ones (i'm talking about the metal case diagonals, not plastic ones, of course), in terms of build quality and optical performance. I'm ye...
I am quite satisfied with this diagonal, which is clearly one class over the standard "kit" ones (i'm talking about the metal case diagonals, not plastic ones, of course), in terms of build quality and optical performance. I'm ye...
Baader T-2 90° Prism Star Diagonal Body # T2-01C 2456005
Binoviewer Enabler
Using this diagonal to shorten the light path for my binoviewer. Back focus was always a problem but now I can achieve focus on both my st80 and st120 without shortening the tube. Add in a 2” T2 nosepiece and a custom T2 binoviewer adapter and you...
Using this diagonal to shorten the light path for my binoviewer. Back focus was always a problem but now I can achieve focus on both my st80 and st120 without shortening the tube. Add in a 2” T2 nosepiece and a custom T2 binoviewer adapter and you...
Baader T-2 90° Prism Star Diagonal Body with Carl Zeiss Prism # T2-01B 2456095
Baader Zeiss spec prism diagonal
I use this with 1.25" and 2" nosepieces and with Eyehold 2 at the eyepiece end. I've primarily used it with SCTs to date and a small refractor. I have had the Baader Prism-1 for the past year and it was fun to compare it with this Zeis...
I use this with 1.25" and 2" nosepieces and with Eyehold 2 at the eyepiece end. I've primarily used it with SCTs to date and a small refractor. I have had the Baader Prism-1 for the past year and it was fun to compare it with this Zeis...
Celestron 1.25" Telescope Star Diagonal # 94115-A
Great right angle prism
Perfect for my C90, and very affordable.
Perfect for my C90, and very affordable.
GSO 1.25" 90-deg Mirror Star Diagonal for Refractors # GSST
Great item at a great
Great item at a great price.
Great item at a great price.
William Optics 1.25" 90-deg Erecting Prism Diagonal with Helical Focusing # D-EP90-125
Fine Focus.
Helical Focus was the sole reason I got this diagonal. It compliments the regular focus on my scope. It worked exactly as I hoped it would.
Helical Focus was the sole reason I got this diagonal. It compliments the regular focus on my scope. It worked exactly as I hoped it would.
William Optics 2" 99% Dura Bright RotoLock Mirror Diagonal for Refractors #...
Beautifully crafted!
Beautifully crafted!
Beautifully crafted!
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for SCTs
Brass rings to secure eyepiece,
Brass rings to secure eyepiece, high quality mirror.
Brass rings to secure eyepiece, high quality mirror.
GSO 1.25" 90-deg 99% Dielectric Mirror Diagonal with Compression Ring
GSO diagonal
Definitely an improvement from the stock diagonal on my Nexstar
Definitely an improvement from the stock diagonal on my Nexstar
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for Refractors
Low Cost High Quality
GSO = Guan Sheng Optical, a Chinese optical factory that makes telescopes and accessories for all the big names, Meade, Celestron, Stellarvue etc. This diagonal is a generic version of a big name, same quality, different logo and paint job. The botto...
GSO = Guan Sheng Optical, a Chinese optical factory that makes telescopes and accessories for all the big names, Meade, Celestron, Stellarvue etc. This diagonal is a generic version of a big name, same quality, different logo and paint job. The botto...
GSO 1.25" 90-deg 99% Dielectric Mirror Diagonal with Compression Ring
Nicely made, sturdy and strong
Nicely made, sturdy and strong construction.
Nicely made, sturdy and strong construction.
GSO 2" 90-deg Mirror Diagonal for SCTs
GSO 2" SCT diagonal
Quick service. Fit and finish are very good. Brass compression rings are a nice touch. Price point excellent. Threaded collar may be a wee bit out of round.
Quick service. Fit and finish are very good. Brass compression rings are a nice touch. Price point excellent. Threaded collar may be a wee bit out of round.
GSO 1.25" 90-deg Erect Image Amici Prism Diagonal # PD90
Use it in my main scope
I live in heavy LP and thought a RACI might make finding objects a bit easier while starhopping. Since I have a good quality finder, I thought I'd try this diagonal before buying a RACI. After I received it, I figured I'd try it in my 120mm...
I live in heavy LP and thought a RACI might make finding objects a bit easier while starhopping. Since I have a good quality finder, I thought I'd try this diagonal before buying a RACI. After I received it, I figured I'd try it in my 120mm...
Baader T-2 90° 32mm Prism Diagonal with 1.25" Nosepiece and Eyepiece Holder # PRISM-1...
EXCELLENT
Waiting for a few years to get one of these. Excellent product and performance.
Waiting for a few years to get one of these. Excellent product and performance.
William Optics 1.25" 99% Dielectric Dura Bright Carbon Fiber Star Mirror Diagonal
William Optics 1.25" diagonal
Great quality product. Fast shipping from Agena.
Great quality product. Fast shipping from Agena.
GSO 0.965"/1.25" 90-deg Hybrid Mirror Star Diagonal
Better than a generic
Perfect fit for the classic telescope
Perfect fit for the classic telescope
Celestron 1.25" Telescope Star Diagonal # 94115-A
Great product and VERY fast shipping
10 stars !!
they Always ship VERY fast.
the Star diagonal is perfect !!
10 stars !!
they Always ship VERY fast.
the Star diagonal is perfect !!
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