This is a high quality Pentax PK lens to Sony NEX-3 NEX-5 NEX E-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>For using Sony E-mount body with Pentax PK lenses.You can mount your Pentax PK lenses on your NEX3， NEX5， etc<br>Turn on &acute;shoot without lens&acute; to use MF lenses with adapters<br>Use your LCD to Focus， only operated in manual focus mode (auto focus is impossible)<br>You can use MF assist function to focus accurately. (7 x or 14 x zoom focus)<br>Infinite focus is guarantee<br>Use M or A mode to operate. (manual exposure and aperture priority exposure)<br>Made of metal， aluminium with black or silver anodized (2 color)<br>Most lens can mount， but be careful with retractable lenses<br>                                                                                                Package Includes            1 x Pentax PK lens to Sony NEX-3 NEX-5 NEX E-Mount Adapter<br>                                                            Extra Info            Compatibility: Sony NEX-3 NEX-5<br>