Features:

Equivalent to a 28-135mm lens, this new EF-S lens brings true wide-angle to tele coverage to EOS 20D and Digital Rebel shooters. It has Canon's Image Stabilization system, allowing safe hand-holding at speeds up to three stops slower than otherwise possible. And of course, it's optically optimized for digital SLRs. A ring-type USM means both fast and silent AF, as well as full-time manual focus when in the AF mode.

Compact, lightweight design with a 5x zoom ratio -- 28 to 135mm equivalent
Excellent optical quality: Aspheric element with two Aspherical surfaces utilized
Close-focusing to 1.15 feet -- at 135mm, fills the frame with subject 3 x 4.4 inches
Ring-type Ultrasonic motor for superior AF performance; allows full-time MF
Image Stabilization extends the lens's usefulness in low-light levels
Circular aperture design -- natural highlights, even stopped down two stops
Non-rotating front element; lens length does not change during zooming
EF-S lens mount -- exclusively for EF-S compatible Digital SLR bodies.

The Canon Zoom Lens EF-S17-85mm f/4-5.6 IS USM offeris a 5x zoom ratio that enables broad shooting range from wide angle to telephoto.

While offering a wide focal range equivalent to 27-136 mm in the 35 mm format, the lens's optical design capitalizes on the merits of the reduced image circle to realize a compact, lightweight body that is 4.8 mm shorter and 65 g lighter that the comparable EF-series lens.

Moreover, the effective positioning of a double-sided glass-molded aspherical lens element ensures exceptional image quality throughout the zoom range.

The lens incorporates Canon's high-performance Image Stabilizer (IS), which compensates for approximately three shutter speeds to allow the handheld capture of shots that would otherwise be blurred by camera shake. Other performance-enhancing features include a fulltime manual focus override, and a 0.35 m minimum focusing distance throughout the entire zoom range for close-up magnifications. The EF-S17-85mm f/4-5.6 IS USM zoom lens features an environmentally conscious design that anticipates the EU's Restriction of Hazardous Substances in Electrical and Electronic Equipment (RoHS) Directive, which is due to take effect from July 2006. The RoHS Directive requires the elimination* of lead, mercury, cadmium hexavelent chromium, polybrominated diphenyl ethers (PBDE) and polybrominated biphenyls (PBB).

* Certain exceptions exist depending on application

Specifications:

Lens Construction (group): 12
Lens Construction (element): 17
No. of Diaphragm Blades: 6
Minimum Aperture: 22-32
Closest Focusing Distance: 0.35m
Maximum Magnifcation: 0.20x
Filter Diameter: 67mm
Maximum Diameter x Length: 78.5mm X 92mm
Weight: 475g