K&F Concept Lens Mount Adapter for Pentax PK K Mount Lens to Sony NEX E-Mount Camera Body, fits Sony NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX-5T NEX-6 NEX-7 NEX-F3 NEX-VG10 VG20 Smooth surface for effortless mount,Infinity focus allowed. Anodized aluminum construction.Smooth surface for effortless mount, fine made to be light weight and strong. Or effortless mount, fine made to be light weight and strong. Compatible Cameras (Including, but not limited to): Sony NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX5T NEX6 NEX7 NEX-F3 a6000 a5000 a3500 a3000 Alpha A7 A7R NEX-VG10 VG20 etc NOTE: This adapter will NOT fit on the Sony a7S, a7 II, a7S II, and a7R II. This Lens Mount Adapter, is made with high standard precision. Its all metal design and polished surface is designed to guarantee smooth mounting and long lasting experiences. It allows Pentax K/PK Lenses to fit on a Sony Alpha NEX E-Mount system camera body. Please note: Infinity focus positionthe position of the infinity mark of the telephoto lens or super telephoto lens is shifted slightly to the positive side to enable focus adjustment even when focus shift is caused due to temperature changes.The shift range is denoted by an L-shaped line, Be sure to check the focus through the viewfinder even when you shoot at infinity.