Standard lens series pentax da lens mount pentax k lens speed 28 focal length 35 mm construction prime lens area of use night photography close up photography focus manual focus closest focusing distance 14 cm focal length equivalent to 35mm camera 53 5 mm number of aperture blades 9 minimum aperture 22 max aperture 28 filter thread 49 mm length 63 mm lens diameter 465 weight 214 g included in delivery lens cap lens pouch lens hood colo