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 for M42 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: Metal Compatible lens: for M42 Mount lens Compatible cameras: for Micro 4/3 Mount camera Front mount: for M42 Mount Rear mount: for Micro 4/3 Mount Item size: 6.0 * 6.0 * 3.0cm / 2.4 * 2.4 * 1.2in Item weight: 60g / 2.14oz Package size: 7.0 * 7.0 * 3.5cm / 2.8 * 2.8 * 1.4in Package weight: 67g / 2.37oz Package List: 1 * M42 Mount Lens to Micro 4/3 Mount Adapter