Canon EF 400mm f/5.6 L USM Lens
Focal length and maximum aperture: 400 mm f5.6 Lens construction: 7 elements in 6 groups Diagonal angle of view: 6°-10° Focus adjustment: Inner focusing system with USM Closest focusing distance: 3.5m / 11.5ft Filter size: 77mm
This high-performance lens was designed with portability and handling ease in mind.
One super UD-glass element, whose characteristics are similar to fluorite, and one UD-glass element result in sharp pictures from corner-to corner.
The lens also has a built-in hood and a detachable tripod mount.