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 area of use sports photography animal photography focus manual focus auto focus af motor ultrasonic motor usm closest focusing distance 150 cm lens construction groupselements 913 number of aperture blades 7 minimum aperture 32 45 max aperture 4 56 fil