Collimation

Celestron Collimation Eyepiece 1.25in The Celestron Cheshire Collimation Eyepiece is ideal for precise collimation of Newtonians and helpful for aligning Schmidt-Cassegrains The Celestron Cheshire Collimation Eyepiece is ideal for precise collimation...

Kendrick Astro aluminum body collimation eyepiece. 1.25 inch barrel.  Simple pinhole style collimator for maintaining your Newtonian reflector collimation.  Used to check primary mirror alignment of collimation centre mark as is commonly placed...