Super telephoto lens series canon l lens mount canon ef lens speed 4 focal length 600 mm suitable for sensor types aps c full frame construction prime lens area of use animal photography image stabiliser focus internal focus auto focus manual focus af motor ultrasonic motor usm closest focusing distance 450 cm lens types ud fluorite lens construction groupselements 1216 number of aperture blades 9 minimum aperture 32 max aperture 4 filt