Canon EF 100-400mm f4.5-5.6L IS USM Telephoto Zoom Lens for Canon SLR Cameras

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.

Technical Details :
* 100-400mm telephoto zoom lens with f/4.5 maximum aperture for Canon SLR cameras.
* 2 Image Stabilizer modes make it easy to capture far-off action or close-in portraits.
* Flourite and Super UD-glass elements largely eliminate secondary spectrum.
* Compatibility with extenders 1.4x II and 2x II; 5.9-foot close focusing distance.
* Measures 3.6 inches in diameter and 7.4 inches long; 1-year warranty.



Lens Specifications :
* 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

Customer Feedback :
This is a serious lens. It is big and heavy and takes fantastic pictures. The image stabilization gets you an extra stop when shooting handheld, in that it minimizes shake enough. I've taken some spectacular twilight shots using this feature. It is a fantastic lens. Great sharpness, clarity, no spectral flares that I've noticed-- none at all-- quick, completely silent autofocus. Reasonably fast lens, the image stabilizer effectively makes it a little faster.
The only problem that I've had with the image stabilizer is that it sometimes makes it hard to frame up parallel lines at the edges of photos.