Canon EF 400 mm f/5.6L USM

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. - 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.