Capture the far-off action of fast-paced sports or zoom in for an intimate portrait with the Canon EF 70-200mm telephoto zoom lens. The L-series lens offers an Image Stabilizer that provides up to four stops of shake correction--a first for Canon IS lenses. The use of fluorite UD lens elements, meanwhile, produces an excellent optical performance in terms of resolution and contrast. Add in a sturdy housing with water- and dust-proof construction and you have a lens that's both portable and high performing. Other details include an f/4 maximum aperture, a ring-type ultra-sonic monitor (USM) that enables quick and quiet autofocusing, compatibility with circular polarizing filters, and a lightweight body. Focal length: 70-200mm Maximum aperture: f/4 Lens construction: 20 elements in 15 groups Diagonal angle of view: 34 to 12 degrees (with full-frame cameras) Focus adjustment: AF with full-time manual focus Closest focusing distance: 3.94 feet Zoom system: 7-group helical zoom (72-degree rotational angle) Filter size: 67mm Dimensions: 3 inches in diameter, 6.8 inches long Weight: 26.8 ounces MTF Charts High-performance, L-series telephoto zoom lens combining light weight and compactness with an f4 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 f4L USM.