The Canon EF 100 mm f/ 2 USM is a fast very compact moderate telephoto for Canon EOS film and digital cameras.
It was designed for film cameras long ago, but shows very good results on digital cameras.
It is one of few Canon lenses which, on the one hand, have an affordable price and, on the other, don't differ in image quality from expensive L-series lenses.
The maximum aperture ratio of 2 alongside with the focal length of 100 mm makes it possible to shoot with shallow depth of field.
An 8-blade aperture provides rather beautiful blurring of out of focus areas (bokeh). However, circles of confusion have noticeable 8-angle shapes.
With a lens speed this fast, the lens allows you to take high-quality pictures in bad lighting conditions without a tripod or a flash.
The Canon EF 100mm f/2.0 USM is already rather sharp even at f/ 2.0. And it is very sharp from f/4.0 onward.
Vignetting is considerable at f/ 2.0, moderate at f/2.8 and almost invisible at f/4.0 and f/5.6. At further aperture settings vignetting does not manifest itself. I wouldn't say it is as bad for open apertures, because vignetting is usually an advantage for portraiture.
Focusing is internal. The front lens does not rotate. Manual adjustment of sharpness is possible at any time by turning the focus ring.
The color rendering is natural with slightly increased saturation. The lens delivers average contrast, which is useful for portrait photography.
The built-in ultra-sonic motor makes focusing rather fast and silent. It perfectly focuses in low-level-light conditions.
The lens is not well resistant to back and side light. It is recommended to use it with a hood.
The Canon EF 100 mm f/2 USM is well fit for shooting portraits, weddings, fragments of nature and architecture, as well as for those types of photography requiring shallow depth of field .
Compatible hood: ET-65III, ET-67
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Posted by: Sergei Borodin Date of publication: 01.09.2010