Super telephoto zoom lens series canon ef lens mount canon ef lens speed 4 focal length 75 300 mm zoom factor 4 times suitable for sensor types aps c full frame construction zoom lens focus manual focus auto focus af motor no internal af motor closest focusing distance 150 cm lens construction groupselements 913 number of aperture blades 7 minimum aperture 32 45 max aperture 4 56 filter thread 58 mm length 122 mm lens diameter 71