The EF-S 17-55mm f/2.8 IS USM offers image quality on a par with Canon's highly regarded L-series lenses. It has a large maximum aperture which, combined with higher shutter speeds can minimize subject motion blur. Shallow depth-of-field separation of a subject from its background is much easier to achieve and the f/2.8 maximum aperture allows a bright finder and extremely precise focusing with f/2.8 compatible AF sensors. The internal stabilization has a sharpness benefit equivalent to a three-stop faster shutter speed, making this lens outstanding in low light situations. Smaller and lighter than lenses of similar specifications, the EF-S 17-55 mm f/2.8 IS USM lens has a 35mm equivalent focal length of 27-88mm and is compatible only with the EOS 30D, EOS 20D, EOS Digital Rebel XT and EOS Digital Rebel SLRs.

Specifications
Weight:	22.75 oz / 645 g
Notes:	Image size: APS-C 35mm film equivalent focal length (mm) 27-88
Construction:	Elements/Groups: 19-Dec
Angle of view:	H: 68º 40' - 23º 20' V: 48º - 15º 40' D: 78º 30' - 27º 50'
Closest Focusing Distance:	0.35m / 1.14 ft.
F stop range:	f/2.8-22
Maximum Magnification:	0.17x (at 55mm)
Filter Size:	77mm
Dimensions (Length x Diameter):	4.35" x 3.28" / 110.6 x 83.5