Standard zoom lens series pentax smc da lens mount pentax k lens speed 35 suitable for sensor type aps c construction zoom lens area of use landscape photography focus manual focus internal focus auto focus af motor ultrasonic motor usm circular aperture closest focusing distance 49 cm focal length equivalent to 35mm camera 27 5 414 mm lens type ed lens construction groupselements 1316 minimum aperture 22 45 max aperture 35 63 lens