Can be used on NEX E mount SYSTEM camerasHas no ROM connection on the ring so diaphragm control of the lens is set manuallyCan be used with Macro rings and other accessoriesAllows infinity focusMaterial: Anodized Aluminum MetalColor: BlackSuitable For LENS: Contax/Yashica C/Y; CAMERA: SONY NEX-5, NEX-3; Camcorder: SONY NEX-VG10Size: 35(H)*65(D)mmWarning:Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter.In such 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.