Celestron 1.25" Erect Image 45 Degree Diagonal

Celestron 1.25" Erect Image 45° Diagonal

The Celestron 1.25" Erect Image 45° Diagonal is the ideal accessory for anyone wanting to use their telescope for both astronomy and terrestrial viewing. Designed for refractor and catadioptric telescopes such as Schmidt-Cassegrains, it corrects the inverted or mirrored images often produced by standard diagonals, delivering views that are right-side-up and left-to-right correct.

Key Features

Day & Night Use: Perfect for transforming your astronomy telescope into a terrestrial spotting scope.

Correct Image Orientation: Produces natural, upright views with correct left-to-right alignment.

Comfortable Design: The 45° Amici prism diagonal provides an ergonomic angle for extended daytime viewing.

Easy Installation: Simply replace your existing star diagonal with the erect-image diagonal—no tools required.

Durable Build: Made to withstand regular use while maintaining optical quality.

Compatibility

Works with refractor and catadioptric telescopes (like Schmidt-Cassegrains).

Not suitable for Newtonian reflectors, which will still show rotationally offset images.

Perfect For

Birdwatching, wildlife observation, and landscape viewing

Boating and marine spotting

General astronomy with natural image orientation