Cheshire Eyepiece for Collimation

thingiverse

I'm too cheap to buy a proper Cheshire collimator, so I made this one. To make it dead simple, there is no side cutout to let light in, so just point the telescope at a bright white wall. This is good guide on how to collimate a Newtonian telescope: https://skyandtelescope.org/astronomy-resources/how-to-align-your-newtonian-reflector-telescope/ The Cheshire is used in Step 3. Made to be printed without supports.