Macro lens telephoto lens series pentax smc dfa lens mounts pentax k pentax kaf lens speed 28 focal length 100 mm suitable for sensor types aps c full frame construction prime lens area of use portrait photography macro photography close up photography night photography focus auto focus manual focus af motor no internal af motor max magnification 11 closest focusing distance 30 cm focal length equivalent to 35mm camera 150 mm lens type aspherical