SkyWatcher 45 Degree 31.7mm Erect Prism Diagonal is a lightweight, reliable and high-quality material construction. It is suitable for use with Refractors, Maksutov and Schmidt-Cassegrain telescopes to produce a correctly orientated view and a more comfortable viewing position.

It features fully-coated diagonals that offer correctly oriented images with excellent sharpness and contrasts. It has a straightforward 45 Erecting Prism with 1.25″ nosepiece. This is designed primarily for terrestrial observing.