Telephoto zoom lens series sony sal lens mount minolta asony a lens speed 56 focal length 55 300 mm zoom factor 55 times suitable for sensor type aps c construction zoom lens focus manual focus auto focus af motor ultrasonic motor usm circular aperture reduced frame size max magnification 13 7 closest focusing distance 140 cm focal length equivalent to 35mm camera 82 5 450 mm lens type ed lens construction groupselements 912 number