Amazon.com : EF-EOS R Pro Auto Focus RF R Mount Adapter with Security Lock Compatible with Canon EF/EF-S Lens to EOS R Camera System EOS R R5 R5C R6 RP C70 Red
Video: Know Your FX9: E-mount Lever Lock | Sony Cine
Canon Zoom Lock Switch -- Canon Digital Cameras in photography-on-the.net forums
LensLock Law Enforcement Technology
Know Your Lens Barrel (1): Useful Marks, Rings, and Switches
Confluence Mobile - Lehigh Confluence
Arri PL (Positive Lock) Mount Lens to Canon RF Mount Mirrorless Camera Body with Built-In Variable ND Filter – Fotodiox, Inc. USA
SNAPSNAP lens cap clip | 05132-P00002(BLO)
Possible to lock focal length on zoom lens? (SELP1650) - Photography Stack Exchange