Canon EF 70-200mm f/4L USM review
High-performance, L-series telephoto zoom lens combining light weight 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.