Size Name:OM-NEX If you have a SLR or DSLR camera and other maker/mount lenses, the Beschoi Mount Adapters allow you to use your lenses on the film/digital camera body. Sharing lenses has some distinct advantages. Certain prime lens just can't be replaced, and you save the cost of purchase on new lenses. The Beschoi adapter allows you to place your favorite Olympus OM lens on your Sony NEX E-Mount camera body. With this adapter ring, the lens will fit physically, but automatic diaphragm, auto-focusing, or any other function will not work. You can shoot with manual mode with Sony NEX Camera This adapter gives you the ability to use your irreplaceable prime lens with your new camera and saves you the cost of purchasing new lenses. Adapter Can Attach Different Brands Lenses To Other Camera Bodies,Greatly Increasing The Resource Of Lens And Bring Fun During Shooting. Automatic diaphragm, auto-focusing, and other functions will not operate correctly while using this adapter as it is not electronic. 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. Infinity focusing is guaranteed. Compatible Cameras (Including, but not limited to):Sony Alpha Nex E-mount Camera: Sony Alpha a7, a7r, NEX-3, NEX-5, NEX-C3, NEX-5N, NEX-7, NEX-F3, NEX-5R, NEX-6,NEX- VG10, NEX-VG20, NEX-VG30, NEX-VG900, NEX-FS100, NEX-FS700, NEX-EA50 Notice: This adapter will NOT fit on the Sony a7S, a7 II, a7S II, and a7R II. What's in box: 1 X Lens Adapter 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.