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Celestron 127EQ Collimation Aide
This is a 3D model of the collimation cap suggested by niuno15 at astronomyforum.net.Gadget
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This is a 3d model of a cap used to aid in collimation of the Celestron 127EQ newtonian reflector telecope. This was described by niuno15 in this thread:
This is placed inside the main telescope tube, onto the bottom of the focuser, and provides a target for the reflected laser beam to hit.
This method is also known as the barlowed method, because it makes use of a barlow lens. The Celestron 127EQ has a "barlow" kind of built in to compensate for a shortened tube. This makes conventional collimation difficult, but lends well to this barlow method.
This process is described here as well for normal newtonian reflectors:
Anyway, I modeled this in Openscad, and the scad file is included, so feel free to change some parameters around.
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