Some Canon EF lenses incorporate an image stabiliser to prevent camera shake from spoiling the shot. This is particularly useful on close-ups or at slow shutter speeds, in situations where a tripod camera cannot be used. Optical shake is detected by gyro sensors which provide data to neutralise the shake. Some EF lenses have two IS modes, including one for panned shots to help you enjoy still greater photographic freedom.

Real freedom of framing in a lightweight, compact and fast-focusing lens. The EF-S 17-85mm f/4-5.6 IS USM is an excellent all-purpose lens for EF-S mount EOS cameras.

Features
Exceptional zoom range for all EF-S mount bodies
Superb image quality
Lightweight and compact
Image Stabilizer - up to 3 stops compensation
Fast near-silent USM AF
Super Spectra coatings
Circular aperture
Optional exclusive lens hood