The EF 16-35mm f/2.8L USM is a high performance, water-resistant, and ultra wide-angle Canon L-series lens. It features 3 high-precision aspherical lens elements, each of a different type: ground, replica and GMo for great image quality. The circular aperture produces a beautiful and natural background blur when shooting at wider apertures. Other features include internal focusing, a ring type USM (Ultra Sonic Monitor), and AF algorithms for fast and quiet autofocusing.
Filter Size: 77 mm Closest Focusing Dist: 0.9 ft Length: 4.13 in. Weight: 20.8 oz.