Bahtnikov Mask for Celestron Sky Prodigy 130 or NexStar 130
thingiverse
Bahtnikov Mask for Celestron Sky Prodigy 130 or NexStar 130. I used http://astrojargon.net/maskgenerator.aspx to calculate the optimal dimensions and drew this up in DesignSpark Mechanical. Should be appropriate for any 650mm focal length newtonian with a 150mm opening. Instructions I printed this in black ABS with 0.2mm layer height, one shell, 100% infill. Depending on your slicer and nozzle size, you may have trouble getting the 2.2mm wide slats to print solid. Simplify3D with a 0.4mm nozzle did not want to print infill with 2 shells. To finish, just add a few bits of self adhesive velcro (the soft side) to the tabs to make sure it sits snug in the scope, without flexing.
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