Diagonals & Prisms

A Star Diagonal lets you view objects that are at a 90° angle from the direction the telescope is pointing, thereby allowing comfortable viewing wh...

This 90° 1.25" mirror-type star diagonal has Everbrite dielectric mirror coatings for 99% reflectivity. In addition to higher reflectivity than a c...

This 45-degree viewing angle image erecting diagonal is designed to use 1.25" eyepieces in catadioptric scopes with a 1.25" visual back or in refra...

This 90° 1.25" mirror-type star diagonal uses enhanced aluminum mirror coatings for a full 95% reflectivity. The mirror is overcoated with quartz f...

This unique 60° viewing angle 1.25" diagonal allows more comfortable extended viewing of objects near the ecliptic (the Moon and planets, among oth...

Use the iOptron 90° Dielectric Star Diagonal to place your head in a comfortable viewing position when your refractor or catadioptric optical tube ...

This premium Questar 45° viewing angle image erecting diagonal fits into the back of any Questar 3.5" scope to provide upright and correctly left-t...

This premium 1.25" Takahashi TAKSD1 compression ring prism star diagonal is the diagonal that Takahashi puts with all of their complete telescope s...