Description: Allow to focus infinity. There is no ROM connection; all functions need to do manually. Work is very delicate, with the bayonet close and smooth. All metal precision machining, durable. You can transfer the Pentax PK lens to Sony Nex-3 Nex-5 Cameras. Specification: Color:Black Material:Metal Diameter:60mm Height:30mm Compatible with: for Sony Nex-3 Nex-5 Cameras. Package Includes: 1x Lens Mount Adapter Note: The basic use of the camera: 1, first set in the camera menu: open "no lens shooting", you can use the adapter ring. 2, the use of LCD focus, all manual focus. 3, available MF zoom function. 4, you can use M or A mode shooting. 5, infinity can focus
