Canon EF series USM L Standard lens with an aperture of f/2.8 is compatible with Canon Digital SLR cameras. This Canon lens is capable of being used with Auto & Manual focus. It contains 16 elements in 13 groups and features a focal length of 24 - 70 mm. The lens is compatible with 77 mm filters. It has 8.32 cm diameter, 12.4 cm length and weighs 950 g.