PENTAX Mount Adapter K This is a ring for attaching lenses (M42 mount) from Leica, old rangefinder cameras, Asahi Pentax SP series, etc., to K-mount series cameras (Pentax MX series, KX series, etc., both film and digital) made by PENTAX. It is used by fitting it into the lens mounting position on the camera. I purchased the genuine product and only attached it to my LX a few times. - Brand: PENTAX - Model: Mount Adapter K - Accessories: Body only - Color: Silver - Material: Metal I am also listing other excellent condition PENTAX LX items, so please take a look.