The EF 16-35mm f/2.8L II USM is a high performance, water-resistant, and ultra wide-angle Canon L-series lens. It has been specifically designed for improved edge-to-edge image quality that will meet the strict requirements of professional photographers. It features 3 high-precision aspherical lens elements, each of a different type: ground, replica and GMo for even better image quality than the original EF 16-35mm f/2.8L USM. 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 new AF algorithms for fast and quiet auto-focusing.
 
Focal Length: 16 – 35 mm
Aperture: T2.8 – T22
Min. Focus: 0.28 m / 0.9 ft
Max. AOV [Horizontal & Vertical]: 98* – 54* H / 74* – 38* V
Length: 111.6 mm / 4.4 in
Weight: 1.4 lbs
Front Diameter: 88.5 mm / 3.5 in
Camera Mount: EF