Cloud Break Optics

1.25" Mirror Diagonal (6231)

1.25" Mirror Diagonal (6231) - Main image
$50.56 $79 In stock

Category: Observing Aids

The iOptron 1.25" Mirror Diagonal (6231) is a 90-degree star diagonal with a dielectric coated mirror, designed for use with iOptron optical tube assemblies. It lets you view at a comfortable angle through 1.25" eyepieces.

  • 1.25" barrel size for standard 1.25" eyepieces
  • 90-degree diagonal configuration
  • Dielectric coated mirror
  • Intended for use with iOptron OTAs
  • SKU 6231
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Thomas M. ★★★★★

I’ve been using this 90-degree star diagonal for a few weeks, and the dielectric coated mirror delivers noticeably brighter, clearer views than my old prism diagonal. The 1.25" size fits my telescope perfectly, making eyepiece swaps smooth and hassle-free.

Richard ★★★★★

The dielectric coating on this diagonal really delivers—stars snap into crisp focus with no dimming or color shift that I can notice. It’s a solid upgrade over the stock prism, and the 90-degree angle makes lunar viewing much more comfortable.

Adam ★★★★★

I was getting neck strain craning to look through my telescope, but this 90-degree diagonal makes viewing at the eyepiece so much more comfortable. The dielectric coated mirror gives a nice, crisp image without any noticeable light loss.

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