Overview: Canon EF EF-S lens to Olympus / Panasonic micro 4/3 (Micro Four Thirds) adapter Make EF EF-S mount lenses can be used on Micro 4/3 SYSTEM cameras There is no ROM connection on the ring so diaphragm control of the lens is set manually It is possible to use Macro rings & other accessories It allows to infinity focus.NOTICE: Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. In this case "stop-down mode" will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. You can shoot with manual mode or aperture priority mode. Package Contents: 1 x Lens mount adapter Suitable For:LENS: Canon EOS EF EF-SCAMERA: Olympus E-P1 E-P2 Panasonic DMC-G1, DMC-GH1, DMC-GF1 Specification: Weight Approx:60.1g Size Approx:7 x 6.4 x 2.8