This lens has a minimum focusing distance of 3.9′ (1.2 m) at all zoom settings so you can shoot close to your subject even in smaller spaces. Like all Canon L-series lenses, this telephoto zoom is dust and moisture resistant and designed to keep on going even in the most challenging of environments.
Fluorite & ultra-low dispersion lens elements reduce aberrations and contribute to high resolution, high-contrast imaging and two-mode Image Stabilization can correct for all types of camera shake; mode 1 corrects for still images and mode 2 for the extraneous up and down movement created when panning with a moving subject.
An ultrasonic autofocus motor provides fast, smooth and silent autofocus, with a manual focus override that enables precise manual focus even when in autofocus mode. A focus range limiter lets you set the range of focus distance which enables shorter focusing times. The two ranges are 3.9′ to infinity and 8.2′ to infinity. A truly round aperture hole results in more pleasing out-of-focus areas.
A removable, rotatable tripod collar is included.