Canon EF 100-400mm f4.5-5.6L IS USM Telephoto Zoom Lens for Canon SLR Cameras.What's in the box: Canon EF 100-400mm f/4.5-5.6L IS USM Autofocus Lens, E-77U 77mm Snap-On Lens Cap,Lens Dust Cap E (Rear), ET-83C Lens Hood,Tripod Collar, LZ1324 Lens Case and 1-Year Warranty.
Equipped with an Image Stabilizer, the Canon EF 100-400mm telephoto zoom lens makes it easy to capture the far-off action of fast-paced sports or zoom in for an intimate portrait with a blurred background. The lens offer such features as fluorite and Super UD-glass elements that largely eliminate secondary spectrum; a floating system that ensures high picture quality at all focal lengths; two Image Stabilizer modes; and compatibility with extenders 1.4x II and 2x II. The lens carries a one-year warranty.

Focal length: 100-400mm
Maximum aperture: 1:4.5-5.6
Lens construction: 17 elements in 14 groups
Diagonal angle of view: 24 to 6 degrees
Focus adjustment: Rear focusing system with USM
Closest focusing distance: 5.9 feet
Zoom system: Linear extension type
Filter size: 77mm
Dimensions: 3.6 inches in diameter, 7.4 inches long
Weight: 3.1 pounds