The EF 100mm f/2 USM is a short telephoto lens with a wide aperture, making it ideal for portraits. The lens compresses facial features and ensures the subject stands out against a blurred backdrop.
The EF 100mm f/2 USM Lens from Canon is a medium telephoto lens with a fast maximum aperture. It is ideal for many telephoto applications including portraiture, as the f/2 aperture provides shallow depth of field focus and its 8-blade diaphragm creates pleasing out-of-focus areas. Its ultrasonic focus motor provides quick and quiet autofocus action and the internal focus system means that the front element does not extend when focusing. Also, lens multi-coating reduces reflections and minimizes flare and ghosting. This is a very sharp prime lens and despite the large maximum aperture, it remains compact. The filter thread and barrel front are metal to add an element of durability.