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.


Specifications:

Focal Length & Maximum Aperture: 17-55mm 1:2.8

Lens Construction: 19 elements in 12 groups.

Diagonal Angle of View: 78¦30' - 27¦50'

Focus Adjustment: AF with full-time manual.

Closest Focusing Distance: 1.15 ft. / 0.35m

Zoom System: 5-group helical zoom (front group moves: 27mm)

Filter Size: 77mm

Max. Diameter x Length, Weight: 3.3 in. x 4.4 in., 22.8 oz. / 83.5mm x 110.6mm, 645g (lens only)


Mfr.# 1242B002