canon ef 100mm f 2.8 macro usm lens for canon slr cameras
bring small things into full-sized view with the canon ef 100mm macro usm lens . macro lenses can uncover detail that would be impossible to detect by the eye and give new perspective to extremely minute subjects such as insects or the petals of a small flower and this lens is no exception . the lens offers such features as a three-group floating system for exceptional close-up performance a secondary diaphragm that blocks stray light at f 2.8 which increases contrast when shooting wide open a ultra-sonic monitor usm that provides outstanding autofocusing speed at all focusing distances a wide manual focusing ring with smooth action and full-time manual focus even in af mode . the first lens in its class to feature inner focusing the lens carries a one-year warranty . focal length 100mm maximum aperture 1 2.8 lens construction 12 elements in 8 groups diagonal angle of view 24 degrees focus adjustment inner focusing system with usm closest focusing distance 1 foot film plane to subject filter size 58mm dimensions 3.1 inches in diameter 4.7 inches long weight 21.1 ounces