Vello M mount Sony E mount adapter macro lock Nex-7

thingiverse

The Vello Leica M mount to Sony E mount adapter fails to secure, causing it to shift into macro mode when placed in a bag, resulting in an out-of-focus image. To maintain sharpness, users must verify its position every time they remove it from their equipment case. A simple lock would keep the macro ring firmly in place, eliminating this inconvenience.