Component for: SLR Telephoto zoom lens White Lens structure (elements/groups): 16/13 Maximum aperture number: 32 Closest focusing distance: 1.2 m Auto focus Manual focus This high performance telephoto zoom lens EF 70-200MM 1:4 L USM provides excellent performance for all general purposes. The compactness and light weight make it an excellent travel companion.Features-Lens construction: 16 elements in 13 groups.-Diagonal angle of view: 34°-12°.-Focus adjustment: USM.-Closest focusing distance: 1.2m.-Filter size: 67mm.High-performance, L-series telephoto zoom lens combining light weight and compactness with an f/4 maximum apertureHigh-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)