M42 rear cap
thingiverse
Nothing more than a rear cap for M42 ols lenses. But this one can be modified easily to fit the screw thread to the accuracy of your printer ! Here it is with an HELIOS 44-2 lens. Print Settings Rafts: Doesn't Matter Supports: Doesn't Matter Resolution: 0.2 mm Infill: 20% Notes: You may adapt the SCAD script just changing a bit this line : clearenceM42 = 1.0; //add some play between nut and bolt (If the screw is too tight increase the value (eg: clearenceM42 = 1.5; //add some play between nut and bolt)
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