Standard zoom lens series pentax smc da lens mounts pentax k pentax kaf lens speed 35 focal length 18 55 mm zoom factor 31 times suitable for sensor type aps c construction zoom lens area of use landscape photography close up photography focus auto focus manual focus af motor no internal af motor reduced frame size closest focusing distance 25 cm focal length equivalent to 35mm camera 27 82 5 mm lens type aspherical lens construction groupsel