Fixed focal length of 100mm
8 lens elements arranged in 6 groups
Diagonal angle of view 24 ?
Rear focusing mechanism with USM (ultra-sonic motor)
Filter thread specification of 58mm
EF 100mm f/2 USM
At f/2 max aperture and 100mm foal length the lens suits the needs of a portrait photographer. The background bokeh, thanks to the large aperture, is beautiful. The lens comes with rear focusing and USM (Ultra-sonic Motor) for fast quiet focusing.
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.
Focal Length & Maximum Aperture
8 elements in 6 groups
Diagonal Angle of View
Rear focusing system with USM
Closest Focusing Distance
0.9m / 3 ft.
Max. Diameter x Length, Weight
3.0" x 2.9", 1.0 lbs. / 75.0 x 73.5mm, 460g