Made of black anodized aluminum (camera body mount) and brass silver (lens mount) the KIWIFOTOS LMA-PK_EM lens mount adapter allows the use of Pentax lenses on the Sony E-Mount NEX Camera. With the adapter your Sony NEX camera will no longer limit to one lens but a variety of Pentax lenses for great picture quality and more fun. The adapter is manual and does not provide auto-focusing and auto-diaphragm therefore, use the lens in the fully manual exposure mode (M), or in the aperture priority (A) mode. When shooting in manual focus, look at the LCD screen or finder to focus.