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When compared to some wide field eyepieces developed especially for binoviewing
Can be used in-between the eyepiece and camera
A durable rubber armored
The #80A is a medium-blue filter that enhances the contrast of the cloud belts on Jupiter and the polar ice caps on Saturn
like fully multi-coated optics and BaK-4 prisms
Celestron Cheshire Collimation Eyepiece - 1.25" - 94182 60 Degree Diagonals When compared to some wideAbout the Celestron Cheshire Collimation Eyepiece 1. 25" The Celestron Cheshire Collimation Eyepiece is ideal for precise collimation of Newtonians and helpful for aligning Schmidt Cassegrains. This special eyepiece fits into 1. 25" focusers or diagonals. Alignment is easy using the small opening on one end and thin cross hairs at the other end. The collimation eyepiece is more accurate than the simple Collimation Tool. Celestron Cheshire Collimation
