Canon EF 300mm f/4L IS USM Telephoto Fixed Lens for Canon SLR Cameras - 2530A004;

The Canon EF 300mm f/4.0L IS Image Stabilizer USM Autofocus Lens has excellent optics and superb handling in a compact package with Image Stabilization. The IS allows safe hand holding at shutter speeds up to two stops slower than otherwise possible--making it even more useful in low-light levels. It's less than half the weight of the 300mm f/2.8L IS, and it focuses to an incredibly close 4.9 ft/1.5m, filling the frame with a subject the size of a postcard. Like all of Canon's fixed focal length L-series lenses above 135mm, it's compatible with Canon's EF Extenders 1.4x II and 2x II. Features EF mount; telephoto lens Ultra-low Dispersion glass with Fluorite elements; inner focusing ring; full-time manual focus; image stabilizer 300mm focal length f/4 maximum aperture Micro UltraSonic Motor (USM)