PK-M4/3 Adapter Ring for PK lens to for Panasonic GF1 GF3 GF5 G10 EP3 G1 Camera Features: Solid metal mount lens adapter allows for Pentax PK lens use on for Olympus/ for Panasonic micro 4/3(Micro Four thirds) camera body. for Focus for infinity Meter Exposure Functions Lens lock / release and stop screw There is no ROM connection on the ring so diaphragm control of the lens is set manually It is possible to use macro rings and other accessaries Fine finishing, Install, remove and operate lens smoothly Specification: Name: PK-M4/3 Applicable lenses: For PENTAX manual lenses Applicable body: For Micro 4/3 mount series body Material: Brass + Aluminum Workmanship: exquisite workmanship, and the combination of the bayonet tight and smooth Function: full manual operation, manual focus, manual aperture adjustment, can be realized with the body manual exposure, aperture priority exposure, infinity focus. Suitable for: For Panasonic G1, GH1 GF1, G2 G10 For Olympus E-P1, EP-2, E-P1L For Pentax PK lens Package Includes: 1 * Lens adapter ring Note: If your camera indicated "lens is not properly installed", please modify the camera menu settings. Usually called the release the shutter the lens is not installed", you can modify the settings to allow. Specifically refer to the camera manual Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate while using this adapter.There is no electrical contacts in the adapter ring. Full manual operation, manual focus, manual iris adjustment can be achieved with body manual exposure, aperture priority exposure.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 in Manual or Aperture Priority Mode. Before use, set your camera Menu: "Shoot without lens".