SkyWatcher 45 Degree Erecting Prism 1.25 Inch for Telescopes

Sky-Watcher 45° Erecting Prism Diagonal — 1.25" (31.7mm)

The Sky-Watcher 45° Erecting Prism Diagonal is a lightweight, easy-to-use accessory designed to provide a correctly oriented, right-way-up and left-to-right correct image when viewing through your telescope. It also places the eyepiece at a comfortable 45° angle, making extended terrestrial viewing far more natural and ergonomic.

Ideal for refractors, Maksutov and Schmidt-Cassegrain telescopes, this diagonal is especially useful when using your telescope for daytime observations such as wildlife, landscapes and distant landmarks.

Clear, correctly oriented views

Unlike standard star diagonals, which typically produce a mirror-reversed image, the erecting prism delivers a true-to-life view — making navigation and framing much easier when observing land-based subjects.

The fully coated prism provides:

• Improved contrast

• Good light transmission

• Crisp, sharp images

Practical design

• 1.25" (31.7mm) nosepiece — compatible with the most common eyepieces

• 45° viewing angle — comfortable for daytime and low-altitude observing

• Durable, lightweight construction

• Simple, plug-and-play installation

Note: while it can be used at night, this accessory is primarily designed for terrestrial observing.

The Sky-Watcher 45° Erecting Prism Diagonal is a practical, affordable upgrade that adds versatility to your telescope — perfect for anyone wanting correctly oriented views with comfortable viewing angles.