William Optics 1.25'' 45 degree Erecting Prism
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William Optics 1.25'' 45 degree Erecting PrismWilliam Optics 1.25'' 45 degree Erecting PrismWilliam Optics 1.25'' 45 degree Erecting PrismWilliam Optics 1.25'' 45 degree Erecting Prism

William Optics 1.25" 45 degree Erecting Prism

£89.00
  (1 Review)
✓ 2 year warranty

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2x in stock shipped 1-2 working days
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About this product

Model:  WOerectPrism1.25

William Optics 45° Erecting Prism will work with 1.25" eyepieces and telescopes with 1.25" eyepiece holders. It turns upside-down views right-side-up and gives correct left-to-right orientation.

  • Large, high-quality BAK4 erecting prism with anti-reflection coating for brightness and contrast.
  • Brass anti-marring compression ring.
  • Baffles and internal blackening prevent internal reflections.

Customer reviews

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Turns my ZenithStar 61 into a fantastic spotting scope.
13 June 2021  | 

I bought the WO Erecting Prism diagonal to use with my ZenithStar 61 scope when I want to do some birdwatching. The 45 degree angle puts the eyepiece in a more comfortable position for terrestrial use than a typical 90 degree diagonal, and when combined with a good quality zoom eyepiece such as Baader's Hyperion Zoom Mk IV turns a small refractor into a superb spotting scope. The only limitation of the design is that Amici prisms generally aren't ideal for high magnification use so while the image is razor sharp at 45x magnification, it looks soft if I add the Baader 2.25x Hyperion Barlow. Switching to a good quality mirror or prism diagonal will enable higher magnifications if you don't mind the left-right reversal and don't fancy paying 500 quid for Baader's excellent Astro Amici Prism.

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