Andoer PK-NEX Adapter Digital Ring for Pentax PK K Mount Lens to Sony NEX E-Mount Camera (for Sony NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX-5T NEX-6 NEX-7) This lens mount adapter ring is mainly used for connecting the Compatible with Sony NEX E Mount camera, such as Sony NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX-5T NEX-6 NEX-7 etc. Completely manual control, manual focus and manual exposure. There is no electrical connection on the ring so diaphragm control of the lens is set manually. It can focus to infinity.