Black anodized aluminum metal design with a brass silver ring the KIWIFOTOS LMA-PK(A)_PQ mount adapter allows PENTAX K lens tofit on the new Pentax mirrorless interchangeable lens camera. This unique adapter is equipped with a "ON/OFF" aperture control ring for user to set the designed aperture. The lens fits physically, auto-focusing control and camera modes which control exposure by automatically adjusting aperture are not retained, however. Preserve all focusing range up to the infinity point.