You do not have to renounce having a quality 1.25" diagonal! Built like the renowned 2" WO diagonal, this dielectric coating diagonal will give you all you need for a lifetime of observations with the highest achievable brightness, contrast and sharpness. A premium product at a discounted price. Check it out and see the difference between a "budget diagonal" and a real bargain!
- Top-notch Performance and Brightness
- Dielectric coating allows 99% reflectivity.
- 10mm thick substrate flat for optimal image stability.
- Polished to 1/10th wave accuracy.
- Accurate design guarantees constant alignment. No further alignment needed.
- Strikingly Beautiful - Patented, elegant design.
- High-quality machining out of the best aluminum. real Carbon Fiber side plates.
- Internally antireflection threaded for highest contrast.
Meticulous Craftsmanship Lock screw for eyepiece/adapter. Big, knurled thumbscrews easy to turn even with gloves on.
Superbly Constructed - Compression ring to prevent barrels marring. - Internal safety stop prevents 1.25 barrels from hitting the mirror.
Why W.O. diagonals do not feature an Adjustable alignment system? - Having an adjustable alignment system is an admission that the diagonal can go out of collimation due to poor mechanical construction. Thanks to the patented design of WO diagonals, you will always have a diagonal that performs perfectly like the first day you got one!
Outside diameter: 32mm, threaded to fit a variety of filters.
Weight: 9.5 oz
Dec 12, 2013
OK Diagonal but eyepiece catch sometimesPros:
Difficult to UseComments:
I like the diagonal but I find that eyepieces don't go in and out of the diagonal smoothly. The compression ring seems to catch sometimes. Not a huge deal but it shouldn't do that.
This review was provided courtesy of AgenaAstro.comJun 3, 2013
Good value for moneyPros:
Accurate,Strong ConstructionCons: Comments:
Since I bought Meade HD-60 series eyepieces for my Celestron Mak 127, the stock diagonal was not large enough to properly fit the new eyepieces. The body of the ep's was touching the diagonal's retaining screw.
No more problem with the 1.25" William Optics diagonal wich is larger.
Icing on the cake, the image is sharp, the diagonal is well built and looks sturdy.
This review was provided courtesy of AgenaAstro.comMay 30, 2013
I would buy this product againPros:
Quality LensesCons: Comments:
I used it in amateur astronomy applications. This diagonal have an unbeatable and superlative performance, more than dielectrics competitors .
I used in a Maksutov Cassegrain 180 mm in where it is possible to catch more details of deep sky objects!!.
This review was provided courtesy of AgenaAstro.comSep 22, 2012
Carbon Fiber Diagonal Worth Every Penny!Pros:
Compression Ring,Strong Construction,Quality buildCons:
Compression Ring SnagsComments:
This is the second dielectric diagonal that I have owned, with an Astro-Tech being my first, and I can say that this Williams Optics diagonal is just as good, if not better, than the Astro-Tech. Optical quality is excellent, with bright and crisp images. Construction is solid and has a very robust feel when handling it. The compression ring holds all EPs firmly in place, with no lateral movement while seated in the diagonal. The only thing I can find real fault with is that some of my EPs, those with recessed channels on the chrome barrel, catch the edge of the compression ring when I try to remove them.
Overall, I'm very satisfied with my purchase. HIGHLY RECOMMENDED!!
This review was provided courtesy of AgenaAstro.comJun 30, 2012
Accurate,Strong Construction,Compact,Lightweight,Easy to UseCons: Comments:
I possessed the 2" version prior to this purchase, and was not surprised when this unit proved as capable as its larger sibling.
This review was provided courtesy of AgenaAstro.comApr 29, 2012
Excellent travel diagonalPros:
Quality Lenses,Accurate,Strong ConstructionCons: Comments:
Well made, nice diagonal. Relatively inexpensive. Important if it will be used on a travel scope (in case it was lost or broken)...I would not feel so bad
This review was provided courtesy of AgenaAstro.comNov 22, 2011
Superb quality at a great price!Pros:
Accurate,Quality Lenses,Lightweight,Strong ConstructionCons: Comments:
I switched from the factory diagonal to this one and the difference was like night and day. Much crisper image quality. Definitely a good value for money. I highly recommend it.
This review was provided courtesy of AgenaAstro.comOct 29, 2011
Solid quality and excellent clarityPros:
Accurate,Quality Lenses,Strong Construction,Easy to UseCons: Comments:
Impressed with the optic quality and the build. Worth the price and AgenaAstro service was great as well.
This review was provided courtesy of AgenaAstro.comOct 28, 2011
Nice upgrade from the Celestron DiagonalPros: Cons: Comments:
Good upgrade to my Celestron SCT 8". Fine craftsmanship, sometimes catches the eyepiece inserted in the compression rings, keeps well collimated, good for astrophotos, although I prefer not using it for imaging.
This review was provided courtesy of AgenaAstro.comJun 3, 2011
Strong Construction,Compact,Quality LensesCons:
This is not the first William Optics item that I have owned, and the third diagonal from their line, I buy and sell used telescopes as I bargain my way to what I really want. They make a quality product at a good price, this diagonal made a huge difference compared to the Meade diagonal that this 10" SCT came with.
This review was provided courtesy of AgenaAstro.com
MAK7 New Member
- Skill Level
- Time with Product
Jan 2, 2011
- User Notes:
- Review by Brad of Phoenix, AZ.
As usual, great W/O fit and finishPros:
Strong Construction,Compact,Solid buildCons: Comments:
I have two W/O 2" diagonals, so when it came time that I actually needed a 1.25" diagonal, this was my first choice. Solid and well built, yet light weight. Every bit as good as I expected, just like the 2' models.
This review was provided courtesy of AgenaAstro.comDec 19, 2010
It's very transparent!Pros:
Strong Construction,Lower Cost,Quality LensesCons: Comments:
This diagonal is too much better then electric (Meade, Celestron). I do not saw the sky in a Meade or Celestron dieletric, but I believe in the Willian Optics Dieletric is the best cost benefit.
This review was provided courtesy of AgenaAstro.comSort by