Celestron 127EQ Collimation Aide

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This is a 3D model of a cap designed to facilitate collimation in the Celestron 127EQ newtonian reflector telescope. Niuno15 originally described this concept in the thread located at http://www.astronomyforum.net/celestron-telescope-forums/98045-improvements-celestron-powerseeker-12... The cap is placed inside the main telescope tube, secured to the bottom of the focuser, and serves as a target for the reflected laser beam. This technique is also known as the barlowed method, which utilizes a barlow lens to achieve accurate collimation. The Celestron 127EQ has an integrated "barlow" feature that compensates for a shortened tube, making conventional collimation challenging but ideally suited for this barlow method. For further information on this process, refer to https://www.cameraconcepts.com/barlowed%20laser%20collimation.pdf. The model was created using OpenScad, and the scad file is included, allowing users to modify parameters as desired.