From the ManufacturerEquivalent 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.Features 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 EOS 20D and Digital Rebel bodiesProduct DescriptionCanon’s 9517A002 EF-S 17-85mm f/4-5.6 IS USM Standard Zoom Lens is equivalent to a 28-135mm lens and brings true wide-angle to tele coverage to EOS 60D, EOS 7D and Digital Rebel cameras. It has Canon’s Image Stabilization system, allowing safe hand-holding at speeds up to three stops slower than otherwise possible. 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.