Cloud Break Optics

Erect Prism Diagonal (TDE100)

Erect Prism Diagonal (TDE100) - Main image
$18.75 $25 In stock

Category: Observing Aids

Description

Most telescopes are designed for astronomical viewing, and come with a star diagonal that will flip the image. While this is fine for the sky surfing, it is preferred to see terrestrial objects, such as birds, in their correct orientation. This Erect Prism Diagonal accomplishes this image correction and, at the same time, places the eyepiece at a convenient 45-degree viewing angle.

It will fit most 1.25" focusers and will accept eyepieces with 1.25" barrels.

Features

  • Image orientation is upright and corrected from left to right
  • 45º for comfort viewing
  • Designed for 1.25” focusers or adapters
  • One year limited warranty
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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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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)

Eva C. ★★★★★

Finally, a diagonal that doesn't flip the image sideways for daytime use—makes spotting birds and landmarks feel completely natural. The image stays crisp and clear right to the edge, even with my 25mm eyepiece.

Harper ★★★★★

I've been using this prism diagonal for birdwatching through my spotting scope and it's a game changer—finally seeing everything right-side up. The image is crystal clear with no distortion at the edges, even when I'm zoomed in on a distant hawk.

Chloe ★★★★★

I was tired of my terrestrial views being upside down, and this diagonal corrected everything instantly—the image is now perfectly upright and sharp. The construction feels sturdy, and it clicks into my focuser without any wobble. Makes daytime bird watching through my scope much more enjoyable.

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