Sigma EX series APO EX HSM Telephoto lens with an aperture of f/4.5 is compatible with Nikon SLR cameras. This Sigma lens is capable of being used with Auto focus. It contains 12 elements in 9 groups and features a focal length of 500 mm. The lens is compatible with 46 mm filters. It has 12.3 cm diameter, 34.95 cm length and weighs 3100 g.