Focuser for Canon 100-400 mm Lens
thingiverse
Focuser for Canon 100-400 mm lens (and possibly other lenses with similar diameter) when used with astrophotography camera. The lens clamp inner diameter is 93.7 mm. Print with PETG or ABS, 100% infill, no supports. You might need to rotate some of the parts in the slicer software before printing them. Please check the snapshot from Simplify3D above for the optimal parts placement on the print bed. I recommend printing the clamp separately and using a raft for that part only. The stepper motor is 28BYJ-48, with a 64:1 gear ratio. Documentation and software for the electronics is available here https://sourceforge.net/projects/arduinoascomfocuserpro2diy/
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