With this adapter, you can use M42 Lenses on Sony NEX E mount camera.Disphragm control of the lens has to be seted manualy due to the adapter is without ROM connection. Infinity focus is guaranteed.Features: Solid metal mount lens adapter allows M42 lens is used on Sony NEX camera body. Allows focus to infinity. Supports A / M mode. The adapter is the top quality in this line. With lock pin and stop screw. Material: Metal.Note:Please note Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter.To use manual lenses on Sony NEX camera, please enable "Release without lens" function in camera menu.Package Include: 1 X M42 lens to Sony NEX Adapter