Laser Collimator for Telescope
thingiverse
The 1.25-inch collimator helps align primary and secondary mirrors in Newtonian telescopes, using a pen-style laser pointer. To assemble, add six M2.5 nuts and screws, insert the laser with alignment screws, and place the collimator into the telescope for adjustment. A prototype tip includes taping the laser button on, tightening a rear cover to switch it off, and attaching the collimator using a "Self Centering Bush." Crosshair grooves are included for wire or thread addition. The sight hole shape has been modified for easier printing without support. For guidance, check out this video showing how to use a commercial version: http://youtu.be/N1asF3m2Mh0.
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