This is a high quality M39 Leica to Sony NEX Mount Adapter. You can use this camera adapter ring in conjunction with the camera adapters to complete the connection to a digital camera supporting a filter thread.                                    Features            New and high quality<br>Made of aluminum and brass<br>Allow focus to infinity， actually go beyond infinity a tiny bit<br>Must turn on 'shoot without lens' setting of your NEX camera in order to use the adapter<br>You can use MF assist function to focus accurately. (7 x or 14 x zoom focus)<br>                                                                                                Package Includes            1 x M39 Leica to Sony NEX Mount Adapter<br>