Cheshire Collimating Eyepiece

This is my REVISED Cheshire Collimating Eyepiece for a 1.25" focuser for a reflector (Newtonian) telescope. I changed the crosshair mounting to a chamfered detail so the crosshair is centered on the tube.

BEFORE PRINTING THE FINAL PARTS - I suggest that you print a short length of the small end of the tube to confirm that the tube will fit a 1/25" focuser. You may have to modify the diameter of the tube (in the slicer software), and the other two parts, to ensure a good fit with a focuser.

Parts are glued together with super glue (or 2-part epoxy for plastic).

Here is a link to collimation instructions:
https://sites.google.com/view/astronomy-db/collimation