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View the Latest Diagonals & Prism Reviews
Item
Submitted By
William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for Refractors
Nice diagonal
First off, just so you're aware, this thing is not small. I put it on a Celestron 6SE with no problems at all. Removed the visual back, screwed this right on. Build quality feels nice and solid. The large thumb screws are nice and work well. The...
First off, just so you're aware, this thing is not small. I put it on a Celestron 6SE with no problems at all. Removed the visual back, screwed this right on. Build quality feels nice and solid. The large thumb screws are nice and work well. The...
GSO 1.25" 90-deg Erect Image Amici Prism Diagonal # PD90
A TRUE BARGAIN
This 2" diagonal is an excellent quality device at half the price you'd pay for a "brand name".
This 2" diagonal is an excellent quality device at half the price you'd pay for a "brand name".
Apr 15, 2019
Celestron 1.25" 45-deg Erect Image Diagonal # 94112-A
small internal prism causes vignetting, reduces FOV
This 45* correct image diagonal prism actually has a clean, sharp image. The problem is that becuase of the small prism (20mm trying to feed 32mm eyepieces), the outer 10% of the FOV is vignetted... that is darker than the other 90%. For that reason...
This 45* correct image diagonal prism actually has a clean, sharp image. The problem is that becuase of the small prism (20mm trying to feed 32mm eyepieces), the outer 10% of the FOV is vignetted... that is darker than the other 90%. For that reason...
GSO 1.25" 90-deg Mirror Star Diagonal for Refractors # GSST
Great buy
Exactly what I need for my late 50’s Tasco !
Exactly what I need for my late 50’s Tasco !
Apr 8, 2019
William Optics 2" Push-In Nosepiece for William Optics Diagonals
Nose Piece
An excellently crafted piece. Most of all however I appreciated the time an effort that your customer service person spent in making sure that it was a compatable piece for my equipment.
An excellently crafted piece. Most of all however I appreciated the time an effort that your customer service person spent in making sure that it was a compatable piece for my equipment.
William Optics 1.25" 99% Dielectric Dura Bright Carbon Fiber Star Mirror Diagonal
William Optics 1.25" 99% Dielectric Dura Bright Carbon Fiber Star
A very beautiful piece of equipment! Can't wait until the weather once cooperates so I can finally use it. Solid and well built and I'm sure it'll perform beyond my expectations.
A very beautiful piece of equipment! Can't wait until the weather once cooperates so I can finally use it. Solid and well built and I'm sure it'll perform beyond my expectations.
GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for Refractors
Better than I thought it
Better than I thought it would be, very pleased with it, would recommend to any one.
Better than I thought it would be, very pleased with it, would recommend to any one.
GSO 1.25" 90-deg Mirror Star Diagonal for Refractors # GSST
Great With My ST80 Clone
I bought this to replace the correct image prism diagonal that came with my ST80 clone, which is a Meade Adventure Scope. The prism was ok for lower magnification terrestrial viewing, but not for astronomy. This GSO mirror diagonal is lightweight and...
I bought this to replace the correct image prism diagonal that came with my ST80 clone, which is a Meade Adventure Scope. The prism was ok for lower magnification terrestrial viewing, but not for astronomy. This GSO mirror diagonal is lightweight and...
William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for Refractors
Perfect
Quality and finish for this accessory.I rediscover the deep sky.Use on CPC 1100
Quality and finish for this accessory.I rediscover the deep sky.Use on CPC 1100
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for Refractors
Another great eyepiece from Agena!
Highly recommend!!!! 5-stars
Highly recommend!!!! 5-stars
Feb 22, 2019
Baader T-2 90° 32mm Prism Diagonal with 1.25" Nosepiece and Eyepiece Holder # PRISM-1...
Nice Diagonal
Great build quality - nice views
Great build quality - nice views
Celestron 1.25" 45-deg Erect Image Diagonal # 94112-A
Works as described for the right application
This does exactly as described. I did find, however, that it was les than ideal for astronomical use. I wanted a right view for public night and it worked just fine. Perhaps out of long habit, I felt the conventional 90 degree was more comfortable. F...
This does exactly as described. I did find, however, that it was les than ideal for astronomical use. I wanted a right view for public night and it worked just fine. Perhaps out of long habit, I felt the conventional 90 degree was more comfortable. F...
GSO 1.25" 90-deg 99% Dielectric Mirror Diagonal with Compression Ring
Nice GSO Diagonal
Needed another good 1 1/4" diagonal. I purchased a GSO 1 1/4" diagonal with a compression ring. This is a nice good quality diagonal and I use it all of the time.
Needed another good 1 1/4" diagonal. I purchased a GSO 1 1/4" diagonal with a compression ring. This is a nice good quality diagonal and I use it all of the time.
GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for Refractors
GSO 2" diagonal
Works as advertised. Excellent views. Holds all my 2" eyepieces securely. Nice product at a very reasonable price.
Works as advertised. Excellent views. Holds all my 2" eyepieces securely. Nice product at a very reasonable price.
GSO 1.25" 90-deg 99% Dielectric Mirror Diagonal with Compression Ring
GSO 1.25" 90-deg 99% Dielectric
very good
very good
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for Refractors
GREAT 2" MIRROR DIAGONAL YIELDING OUTSTANDING LIGHT THROUGHPUT
I HAVE OWNED MANY 'ENHANCED' MIRROR DIAGONALS FROM 1 1/4" TO 2". I'VE OWNED MOST ALL FROM EVERY MANUFACTURE YOU CAN NAME, AND SOME YOU CAN'T. THIS IS A STELLAR PERFORMER AT A GREAT PRICE! I USE THIS IN A GSO 6" CASS...
I HAVE OWNED MANY 'ENHANCED' MIRROR DIAGONALS FROM 1 1/4" TO 2". I'VE OWNED MOST ALL FROM EVERY MANUFACTURE YOU CAN NAME, AND SOME YOU CAN'T. THIS IS A STELLAR PERFORMER AT A GREAT PRICE! I USE THIS IN A GSO 6" CASS...
GSO 2" 90-deg 99% Dielectric Mirror Diagonal for SCTs
Heavy, but very good
I got this diagonal to be able to sin: to use my C6 with my 2" 20mm 82° Meade UWA eyepiece AND my Meade F6.3 reducer. It worked and I enjoyed the view of the Pleiades (it's so much better than with the equivalent 32mm Plössl). However, be...
I got this diagonal to be able to sin: to use my C6 with my 2" 20mm 82° Meade UWA eyepiece AND my Meade F6.3 reducer. It worked and I enjoyed the view of the Pleiades (it's so much better than with the equivalent 32mm Plössl). However, be...
GSO 2" 90-deg 99% Quartz Dielectric Mirror Diagonal for SCTs
Quality Quality Quality
Makes the stock diagonal feel and look like a toy...
Makes the stock diagonal feel and look like a toy...
GSO 1.25" 90-deg 99% Dielectric Mirror Diagonal with Compression Ring
Bright
Needed a new better diag than what came with the scope. Tried the GSO and it is every bit as bright as my Televues.
Needed a new better diag than what came with the scope. Tried the GSO and it is every bit as bright as my Televues.
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