Pentax 21mm F3.2 AL L is an Auto Focus (AF) Wideangle Prime lens with APS-C / DX max sensor coverage and it is designed to be used with Pentax KAF mount lenses.
Pentax 21mm F3.2 AL L is compatible with cameras that have Pentax KAF lens mount.
Max sensor coverage of Pentax 21mm F3.2 AL L is APS-C / DX.
Pentax 21mm F3.2 AL L has a fixed focal lenght of 21mm. When mounted on a APS-C / DX format camera, it provides an 35mm (FF) equivalent of 31.5mm.
Pentax 21mm F3.2 AL L has a max aperture of F3.2 and a minimum aperture of F22.0.