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.
Construction 6 groups /8 elements Angle of view 24° F stop range 2.0-22 Closest Focusing Distance 0.9m / 3 ft. Maximum Magnification 1:7.3 Filter Size 58mm Dimensions (Length x Diameter) 3.0" x 2.9" / 75.0 x 73.5mm Weight 1.0 lbs. / 460g