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William Optics 1.25" 99% Dielectric Dura Bright Star Mirror Diagonal for Star71 Telescope

5.0 (2 Reviews) Read Reviews Write Review
Brand William Optics
Part Number D-125D-WO71
Availability available

Product Info

Manufacturer Description

Dedicated 1.25" dielectirc mirror diagonal made especially for use with William Optics' latest Star71 71mm f/4.9 apo imaging refractor telescope. Allows you to use this scope visually with any 1.25" eyepiece.

This 90° 1.25" mirror-type star diagonal has a Dura-Bright mirror with 1/10 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. The diagonal body features a dedicated M65x1 male thread adapter on the telescope side for direct coupling with the M65 female thread on the end of the focuser tube of the Star71 telescope.

The WO 1.25" Dura-Bright Diagonal for the Star71 telescope 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 mirror substrate flat for optimal image stability.
  • Polished to 1/10th wave or better accuracy.
  • Accurate design guarantees constant alignment. No further alignment needed.

Meticulous Craftsmanship

  • Lock screw for eyepiece/adapter.
  • Diagonal is rotatable when attached to telescope.

Strikingly Beautiful

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

Additional specifications

  • Weight = Xoz.

Reviews

5.0 (Based on 2 Reviews) 100% of reviewers recommended this product.
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    1. Guest

      Skill Level
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      Time with Product
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      User Notes:
      Review by Andrew of El Paso.
      1443398400
      Sep 27, 2015

      5.0 Star diagonal for the William Optics Star71

      Pros:

      Lightweight,Accurate,Strong Construction,Quality Lenses,Easy to Use,Compact

      Cons:

      Comments:

      This is a star diagonal with a single application, namely to provide visual observing when using the William Optics Star71 imaging telescope. To use the star diagonal you must first unscrew the camera adapter from the focussing tube of the Star71 and screw the diagonal on in its place. The diagonal can be rotated and a thumb screw tightened at the correct orientation. With this star diagonal I used a set of X-Cel eyepieces ranging from 2.3mm f/l to 25mm. I had no problems with any eyepieces I tried, and I have to say that the star diagonal performed beautifully, the clearest sharpest viewing I have seen in a small refractor.

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

      This review was provided courtesy of AgenaAstro.com

    2. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Ford322 of Redondo Beach, CA.
      1408406400
      Aug 18, 2014

      5.0 Great Accessory for the Star 71

      Pros:

      Lightweight,Quality Lenses,Easy to Use,Compact,Plug And Play,Strong Construction

      Cons:

      Comments:

      Used with a 32mm Plossl and UHC filter, the entire North American Nebula was visible.

      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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