Features:This lens mount adapter is mainly used for connecting the "M42 mount lens" to "cameras with Micro 4/3 Mount".It is able to Focus Infinity. Completely manual control, manual focus and manual exposure.There is no electrical connection on the ring so diaphragm control of the lens is set manually.Equipped with lock & stop pin.Suit forM42 mount lenses, such as Zeiss, Pentax, Praktica, Mamiya, Zenit.Micro 4/3 Mount DSLR camera.Such as Olympus EP1, EP2 /Panasonic DMC-G1, DMC-GH1, DMC-GF, etc..Specifications:Material: MetalCompatible lens: for M42 Mount lens Compatible cameras: for Micro 4/3 Mount cameraFront mount: for M42 MountRear mount: for Micro 4/3 MountItem size: 6.0 * 6.0 * 3.0cm / 2.4 * 2.4 * 1.2inItem weight: 60g / 2.14ozPackage size: 7.0 * 7.0 * 3.5cm / 2.8 * 2.8 * 1.4inPackage weight: 67g / 2.37ozPackage List:1 * M42 Mount Lens to Micro 4/3 Mount Adapter