Why buy a Canon EF 70-200mm f4L USM Lens?
High-performance, L-series telephoto zoom lens combining lightweight and compactness with an f/4 maximum aperture. Inner focusing and the ring USM enable quick and quiet autofocusing. Also, a circular polarizing filter can be attached and used without difficulty because the front lens element does not rotate during focusing. The tripod collar (sold separately) is the same one used with the EF 300mm f/4L USM.
Canon EF 70-200mm f4L USM Lens Specifications
Lens construction: 16 elements in 13 groups
Diagonal angle of view: 34°-12°
Focus adjustment: USM
Closest focusing distance: 1.2m
Filter size: 67mm