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M42 Lens Mount 3D Printable Models
Adapter ring for lens m49x0.75 to m42x1
Thingiverse
crazysova
M42 to S-Mount Lens Adapter (for circuit board cameras)
Thingiverse
YarrrIBeANoodlePirate
M42 to 0.8" RMS Camera Adapter
Thingiverse
SlavaPHP
T2 to M42x0.75 adapter
Thingiverse
654A1231