Profesional designed Canon EOS mount lens to MFT M4/3 Micro 4/3 camera adapter. Made of aluminum (camera body mount) anodized black, and brass (lens mount) chromed silver. * With Build in Aperture control, It is a solution of using Canon EF lenses to adjust aperture in other cameras with external aperture ring. * For bottom difference of Canon EF lens, this adapter doesn"t compatible for Canon EF S lens, such as: EF S 10-22mm; EF S 15-85mm; EF S 17-55mm; EF S 17-85mm; EF S 18-55mm; EF S 18-135mm; EF S 18-200mm; EF S 55-250mm; EF S 60mm * We suggest Customers to rotate the ring from F2.8 to F22 to adjust the aperture ring in the adapter, if the position beyond 6, maybe dark area will be caused in the photos, for the reason that the aperture ring stay at the position is too small. * Fits Olympus E-P1 E-P2 E-P3 E-PL1 E-PL2; Panasonic G1 G2 G3 G10 GF1 GF2 GF3 GH1 GH2 GH3