Super wide angle zoom lens series pentax smc da lens mounts pentax k pentax kaf lens speed 4 focal length 12 24 mm zoom factor 2 times suitable for sensor type aps c construction zoom lens area of use landscape photography action photography close up photography focus internal focus auto focus manual focus af motor no internal af motor reduced frame size max magnification 18 3 closest focusing distance 30 cm focal length equivalent to 35mm camera