100mm f2 EF

Despite the large maximum aperture, the lens remains compact. Lens group 5 moves for rear focusing, and sharp, crisp pictures are obtained at all apertures. The background blur is ideal for portraits. The USM autofocuses the lens quickly and quietly.

Specifications

Focal Length & Maximum Aperture 100mm 1:2.0
Lens Construction 8 elements in 6 groups
Diagonal Angle of View 24°
Focus Adjustment Rear focusing system with USM
Closest Focusing Distance 0.9m / 3 ft.
Filter Size 58mm
Max. Diameter x Length, Weight 3.0″ x 2.9″, 1.0 lbs. / 75.0 x 73.5mm, 460g
This really is a fine lens. It’s quality is outstanding. Even at f/2 the main subject is sharp and contrasty. The usm drive is quiet and fast. It produces photos, in my opinion, nearly as good as the 135mm f/2, at 40% of the price. I can say that because I’ve owned both lens. Where it does lag, as with the 85mm f/1.8, is build quality. It may perform like a L lens, but it isn’t built like one.
Today, with most of using digitals with ap-s size sensors,the small 85mm is often the prefered choice. But the 100mm, although never as popular, is a great lens. Perhaps one of the best portrait lens you can own.
Contrast and saturation are very good – comparable with the sibling. The optional ET-65III Lens Hood is a wise addition to this lens – to retain the contrast and saturation with bright lights in/near the frame. Some CA is apparent at f/2. Wide open vignetting from the Canon EF 100mm f/2.0 USM Lens will be apparent but not bad for full-frame DSLR users – similar to or slightly better than the Canon EF 85mm f/1.8 USM Lens The Canon EF 100mm f/2.0 USM Lens is one of the better lenses available in regards to distortion – expect only a negligible amount.

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