Prime lens with focal length of 20mm
Max aperture of f/2.8
Floating rear focusing mechanism with USM (Ultra-sonic Motor)
11 lens elements arranged in 9 groups
Angle of view of 94 ?
EF 20mm f/2.8 USM
Prime wide angle lens of 20mm with an image circle optimized for full frame Canon DSLRs. The lens has a fast max aperture of f/2.8 with a floating rear focusing mechanism. It has an angle of view of 94 ? and features USM f(Ultra-sonic Motor) for fast and quiet focusing.
Ultra-wide-angle lens for serious applications. Easy to hold and carry at 14.3 oz. (405g). Floating rear focusing system. Sharp images are obtained at all subject distances.
Focal Length & Maximum Aperture
11 elements in 9 groups
Diagonal Angle of View
Rear focusing system with USM
Closest Focusing Distance
0.25m / 0.8 ft.
Max. Diameter x Length, Weight
3.1" x 2.8", 14.3 oz. / 77.5 x 70.6mm, 405g