Amazon.com : NEEWER EF to EOS M Mount Adapter, EF/EF-S Lens to EOS M Camera Autofocus Converter Ring with Removable Tripod Mount, Compatible with Canon EOS M M2 M3 M5 M6 M6
Leitz Leica M2 M3 90mm / 28mm LTM L39 to M Lens Adapter
M2.5 M3 1/4" 3/8" Camera Screw Set Quick Release Plate Screw DSLR Accessories Tripod Mount Adapter for Camera Cages|Photo Studio Accessories| - AliExpress