Slim EF-M mount to T2 (M42/0.75) thread adapter
thingiverse
For astrophotography, M42/0.75 thread is generally used for APS-C and lower sensors. I started from https://www.thingiverse.com/thing:703383 but it has some plays even with 0.1mm layer height and several tries. I modified scad for 1. make it much tighter fit by adjusting radius of rings and bayonet segments 2. flange has 4mm thickness 3. added 4mm depth female M42/0.75 thread You need support enabled for overhang of inner cylinder cut out. I may be able to create tapered cylinder to remove support requirement but I'm satisfied with current print. So later... (or never)
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