RainbowImaging AF Confirm M42 Screw Mount Lens to Canon EOS EF Mount adapter, for Canon 5D Mark II, 7D, 50D, 40D, 30D, 20D, 650D. 600D, 550D, 500D, 450D, 1100D, 1000D etc
This adapter allows you to use M42 Lens on EOS camera with V5 Program EMF AF Focus Confirmation Chip.