M42 EFM Lens Adapter, 42mm Screw Mount Lens EFM Adapter, allows M42 Lens (from Pentax Takumar, Helios etc) to fit on a Cannon EF-M Mirrorless Camera. Infinity Focus Guaranteed. There is no electrical contacts in the adapter ring Exposure and focus has to be adjusted manually Automatic diaphragm auto-focusing or any other functions will not operated with using this adapter Pls note: This adapter doesn't fit Cannon EF / EFs Mount DSLR, eg. 6D 5D 7D 80D 70D 60D 1300D 1200D 760D 750D 700D Rebel T7i T7 T6i T6 T5I T4i etc Compatible with Canon EF M EOS M Mirrorless Cameras EOS M M2 M3 M5 M6 M6 Mark II M10 M50 M100 M200