The pentax 21mm f32 al limited lens silver is a wide angle lens designed specifically for use with digital slr cameras that feature a pentax k mount this pentax 21mm f32 lens incorporates an aspheric lens element for crystal clear image quality whilst the high grade aluminium lens barrel ensures the lens is compact lightweight but robust this ultra slim lens is ideal for capturing landscapes cityscapes interior shots night scenes group shots and more being part of the pentax limited