The Celestron Cheshire Collimation Eyepiece fits all 1.25" focusers or diagonals.
Ideal for precise collimation of Newtonians and helpful for aligning Schmidt-Cassegrains.
The Celestron Cheshire Collimation Eyepiece is a more accurate way of aligning your telescopes optics than a simple collimation tool.
Special eyepiece design makes it easy to use!