This EF 100-400mm f/4.5-5.6L IS USM Lens from Canon offers high resolution, superb contrast, neutral color balance, and Canon's original built-in Optical Image Stabilization for compensation against blur caused by camera movement.

High zoom magnification is achieved by means of a 6-group configuration with 5 movable groups. Fluorite and Super UD glass reduce secondary spectrum for superb color rendition. Autofocus is fast and silent with Canon's ring Ultrasonic Autofocus Motor (USM), and AF speed is further enhanced through an advanced, lightweight rear focusing design that incorporates a floating element for consistent image quality at all focusing distances from 5.9' to infinity.

This dual-mode image stabilizer is suitable for panning shots as well as stationary subjects. With full-time manual focus, one-touch zooming with a wide grip, a focus range limiter and a special ring that permits adjustment of zooming tension, this is a lens that's extremely easy to use, and ideal for a wide variety of applications including nature, wildlife, sports, and documentary photography.

A removable, rotatable tripod collar is included and the front filter thread diameter is 77mm.