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William Optics 2" 99% Dura Bright RotoLock Mirror Diagonal for SCTs # D-DIG2D-ROTO-SCT

4.8 (5 Reviews) Read Reviews Write Review
Brand William Optics
Part Number D-DIG2D-ROTO-SCT
Availability

Product Info

Manufacturer Description

Introducing the New William Optics 2015 Dura-Bright diagonal with RotoLock # D-DIG2D-ROTO-SCT - a dramatic step forward in the evolution of mirror diagonals! This diagonal combines William Optics' excellent 2" Dura-Bright diagonal with their new 2" RotoLock eyepiece holder.

Thoughtfully designed, exquisitely machined, and artfully presented, the RotoLock eyepiece holder provides a very convenient and robust method to attach eyepieces and accessories to your telescope. Just rotate the golden grip ring clockwise to lock any inserted eyepiece or accessory, or counter-clockwise to release the accessory. Innovative design ensures that you get a very solid hold and the accessory is perfectly centered every time. No thumbscrews to worry about!

This 90° 2" mirror-type star diagonal has a Dura-Bright 12mm thick mirror, 1/12 or better wave surface accuracy, and dielectric mirror coatings for 99% reflectivity which provides higher contrast and resolution during critical planetary, lunar and binary star observations. Features an SCT adapter on the telescope side for attachment to all SCTs that have a standard 2" SCT male thread on the rear (2" x 24 TPI).

Dura-Bright features 100% real carbon fiber side plates that add that touch of class your scope deserves. 1.25" Rotolock eyepiece adapter sold separately.

The WO 2" Dura-Bright Diagonal was designed with several unique features to provide optimum performance and years of use.

Top-Notch Performance and brightness

  • Dielectric coating allows 99% reflectivity.
  • High precision 12mm thick mirror substrate flat for optimal image stability.
  • Polished to 1/12th wave accuracy.
  • Accurate design guarantees constant alignment. No further alignment needed.

Strikingly Beautiful

  • Patented, elegant design.
  • High-quality machining out of the best aluminum.
  • Internal anti-reflection baffling for highest contrast.
  • Real Carbon Fiber side plates

Superbly Constructed

  • Compression ring to prevent barrels from marring.
  • Internal safety stop prevents 2" barrels from hitting the mirror.

Additional specifications

  • Weight = 1lb-1.5oz (496g)

Reviews

4.8 (Based on 5 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      Review by Len R.
      1513564964
      Dec 17, 2017

      5.0 Great!

      Pros:

      Cons:

      Comments:

      Fabulous diagonal! Very high quality.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Ralph R.
      1507393799
      Oct 7, 2017

      5.0 What's not to like !

      Pros:

      Cons:

      Comments:

      Confirmed; the "Roto-lock" feature does center those wobbly undercut
      eyepiece tubes. Not to mention--the revelation that my thirty-year-old
      Meade diagonal mirror was the dim and fuzzy link in my viewing!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by pamela w.
      1501674116
      Aug 2, 2017

      5.0 William Optics 2" 99% Dura Bright RotoLock Mirror Diagonal for SC

      Pros:

      Cons:

      Comments:

      I am very pleased with the WO Diagonal . When using my heavy Televue eyepieces ( some weighing 5lbs ) I felt they were very secure even when the telescope was rotating and flipping . The view is very sharp and clear , and I would highly recommend this Diagonal.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      Review by MonolithicTitans
      1484108945
      Jan 10, 2017

      5.0 Worth it?

      Pros:

      Cons:

      Comments:

      Well, I have to say I am very happy I bought this product along with the adapter for use of 1" EPs. I own a Celestron SE8 SCT and I noticed a big difference in the clarity and sharpness of everything, compared to the stock one. The ease of changing EPs makes the RotoLock well worth the money and they hold with whatever level of strength you want to twist them. The automatic centering of the EP is nice too.

      The only con I can even think of is the SCT connection is a bit tricky as the treading should probably be counter treaded on one end of the SCT connection to Diagonal connection, the tube itself (Don't know if that has a name). I managed to almost seized it to my focal reducer, took some magic to get it off without damaging anything, lesson learned! I haven't had an issue since.

      Other than that, I'm completely happy with my purchase and am glad I did my research before hand because, I will never need another diagonal as long as I live.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by Hikescdnrckys of Mississauga, Ont. Canada.
      1469232000
      Jul 22, 2016

      4.0 Made an amazing differnce in my viewing!

      Pros:

      Accurate,Strong Construction,Lightweight,Easy to Use

      Cons:

      Comments:

      I replaced the 1.25" diagonal that came with my Celestron Evolution 9.25 with this model, and I noticed a difference almost immediately on my first night of viewing. Everything was just crisper and brighter with the Williams Optics diagonal, I could see details not visible through the stock diagonal. My only complaints and the only reason this did not earn 5 stars, was the collar to lock the diagonal to the scope is flat and difficult to get your fingers in there to tighten it. I also found it not as easy to rotate and lock the diagonal so that the eyepiece can be positioned for shorter users at public outreach sessions. Otherwise I am very glad I purchased this diagonal.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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