Made of black anodized aluminum (camera body mount) and brass silver (lens mount)the KIWIFOTOS LMA-PK(A)_N1 mount adapter allows the use of Pentax K-Mount lens on the Nikon 1 mount camera (Nikon 1 J1, Nikon 1 V1 etc.). This unique adapter is equipped with a "ON/OFF" aperture control ring for user to set the designed aperture. The lens will fit physically and the camera works in manual mode with the adapter. Preserve all focusing range up to the infinity point‍