We are here to help
Monday to Saturday - 10:00am-4:00pm

William Optics 1.25" Dura Bright Dielectric Carbon Fiber Diagonal

(Inc. 20% VAT)
Loyalty Points: 105
In stock, Shipped in 1-2 working days
Product Code
Email us a question about this ProductWilliam Optics

William Optics 1.25" DURA BRIGHT Dielectric Diagonal - This is a brand new item!

Introducing New 2015 model William Optics Dura-Bright diagonal - a dramatic step forward in the evolution of mirror diagonals! This 90º 1.25"mirror-type star diagonal has a Dura-Bright thick mirror and dielectric mirror coatings for 99% reflectivity which provides higher contrast and resolution during critical planetary, lunar and binary star observations.

Dura-Bright features 100% real carbon fiber side plates that add that touch of class your scope deserves.

The WO 1.25" 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.

Meticulous Craftsmanship

  • Lock screw for eyepiece/adapter. 
  • Big, knurled thumbscrews are easy to turn even with gloves on. 
  • Threaded for 1.25" Filters. 

Strikingly Beautiful

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

Superbly Constructed

  • Compression rings (both on diagonal and adapter) to prevent barrels from marring.
  • Internal safety stop prevents 2" barrels from hitting the mirror. 
  • Designed for high-end scope .

SCT adapter is optional

  • SCT ring makes your diagonal work on SC telescopes or our ZS66 series as well! Get one diagonal, use it on ANY telescope! 

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 as perfectly as on the first day you got it! 

Specifications: William Optics 1.25" Dura Bright Dielectric Carbon Fiber Diagonal

  • Ultra High Dielectric 99% reflectivity.
  • Precision 1/10 lambda surface with 12mm thickness mirror for best quality.
  • 2"- 1.25" adapter with brass clamping ring,includes
  • Inside diameter (48mm): threaded to fit a variety of filters.
  • Weight : 210g

What's in the Box

What's in the Box: William Optics 1.25" Dura Bright Dielectric Carbon Fiber Diagonal

Reviews (0)

Be the first to Write a Review for this item!


At The Widescreen Centre, we prioritize prompt order processing and dispatch. We strive to dispatch all orders on the same day or the next working day, depending on the time of your order. We hold extensive stocks to ensure that your items are ready for immediate despatch. Please note that the cut-off time for same-day dispatch is usually 1:30 p.m.

For delivery within Mainland UK, we use reputable couriers to provide efficient service. You can expect your package to arrive in 1-2 working days. Please note that a signature may be required upon delivery to ensure a secure receipt.

In the case of special order items, the delivery time may be longer. If you have any concerns or questions about the delivery of your item, please don't hesitate to Contact Us. We are here to assist you.

Should there be any delay in dispatching your order, we will notify you to keep you informed.

Please be aware that The Widescreen Centre cannot be held responsible for any postal or third-party delays that may occur. We are committed to providing a reliable and efficient delivery service for our valued customers.

For more information please click here

FAQ - Have a question about this product? Fill in the form below and we will get back to you as soon as we can!

Also Bought
William Optics SWAN Eyepieces
William Optics SWAN Eyepieces
From  £74.00
Celestron Omni Series Eyepieces
Celestron Omni Series Eyepieces
From  £49.99
William Optics 48mm T Mount for Canon EOS or Nikon
From  £31.00
Astronomik CLS Filter
Astronomik CLS Filter
From  £71.00
Astronomik Deep-Sky RGB FilterSet
Astronomik Deep-Sky RGB FilterSet
From  £98.00
Celestron Dew Shield DX for C6 and C8