Mamiya m645 lens aperture coupling

thingiverse

This is a super niche little widget, but I'm uploading it in case anyone else finds themselves in the exact same position.Mamiya m645 lenses use a little aperture coupling tab to connect the lens to the metering prism, commonly referred to as "bunny ears". I found an old lens at a thrift store which was missing its bunny ears, so I decided to see if I could successfully replicate it as a 3D print. Turned out I could!You will need a pair of m1.4 screws to attach it to the lens, and they have to be pretty short. If you screw them in too far, they'll actually press against the aperture ring and it won't move at all. I took a pair of m1.4x4 screws and cut off the tips so they were just long enough to hold.