Sigma EX series DG HSM APO OS EX AF Micro lens with an aperture of f/2.8 is compatible with Canon SLR cameras. This Sigma lens is capable of being used with Auto & Manual focus. It contains 19 elements in 14 groups and features a focal length of 180 mm. The lens is compatible with 86 mm filters. It has 9.5 cm diameter, 20.39 cm length and weighs 1630 g.