Astromania 1.25Inch Metal Collimating Cheshire Eyepiece without Laser for Newtonian Reflector Telescope - Short Version: Telescope Accessories: Amazon.com.au
1.25 "collimator for reflector telescopes and Maksutov-Cassegrain — Raig
How to Collimate a Maksutov Newtonian - YouTube
Quick and easy Maksutov Telescope Collimation check - YouTube
How To Collimate a Telescope? A Beginner's Guide
How to collimate a Schmidt-Cassegrain telescope - BBC Sky at Night Magazine