Focal length range of 17-55mm
Fast constant max aperture of f/2.8
Inner focusing with ring-type Ultra-sonic motor (USM)
UD and Aspherical elements
19 lens elements arranged in 12 groups
EF-S 17-55 f/2.8 IS USM
A bight standard zoom lens with a focal length of 17-55, it has a bright constant aperture of f/2.8. The lens construction incorporates the use of UD (Ultra-low Dispersion) elements and aspherical elements together with a ring-type USM (Ultra-sonic motor). The lens is suitable as a perfect portrait and standard zoom lens for everyday photography needs on an APS-C DSLR with a crop factor of 1.6x.
To meet user demands for a fast EF-S zoom lens, Canon has specially designed a new lens with a large aperture of f/2.8 for select Canon Digital SLR cameras.* The large circular aperture produces a shallow depth-of-field, creating background blur that draws attention to the photographic subject. The lens construction includes UD and aspherical elements, which deliver impressive image quality throughout the entire zoom range. Image Stabilizer lens groups shift to compensate for camera movement so that the image appears steady on the image plane, ensuring clear, crisp images, even in dim light. With a Ring-type USM, inner focusing and new AF algorithms, this lens achieves autofocus quickly and quietly, and with full-time mechanical manual focusing, manually adjusting the focus is possible even in AF mode.
Focal Length & Maximum Aperture
19 elements in 12 groups
Diagonal Angle of View
78°30' - 27°50'
AF with full-time manual
Closest Focusing Distance
1.15 ft. / 0.35m
5-group helical zoom (front group moves: 27mm)
Max. Diameter x Length, Weight
3.3 in. x 4.4 in., 22.8 oz. / 83.5mm x 110.6mm, 645g (lens only)
Hood: EW-83J (bayonet, petal form, two-claw removable hood; attachable in reverse)