Canon EF 100mm f/2.8 Macro USM Lens for Canon SLR Cameras
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Product Review
Canon EF 100mm f/2.8 Macro USM Lens for Canon SLR Cameras boasts of an ultrasonic monitor that provides outstanding autofocusing speed at all distances. Its secondary diaphragm blocks stray light at f/2.8 for increased contrast. It has a 3-group floating system for exceptional close-up performance and full-time manual focus. It measures 3.1 inches in diameter and 4.7 inches long and weighs 21.1 ounces.
This f/2.8 Macro USM Lens is suitable for macro photography up to life-size (1x) magnification. Inner focusing affords a long working distance of 5.9 inches to infinity. 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 extra length over a 50mm macro gives much better working distance (space between lens and subject) in the field, and EOS-compatible lenses by other manufacturers match poorly with accessories and are nowhere near as sharp. The USM lens also can accept a tripod collar (by use of a small plastic adapter).