about this item:

Canon EF 16-35mm f/2.8L III USM Lens

Characterized by a revamped optical design, the EF 16-35mm f/2.8L III USM from Canon is a workhorse wide-angle zoom and member of the well-regarded L-series of lenses. Featuring a series of specialized elements, this lens utilizes a trio of aspherical elements and two ultra-low dispersion glass elements to control a variety of aberrations for high sharpness and clarity. Both SWC and ASC coatings have also been applied to the elements in order to reduce lens flare and ghosting for increased contrast and color accuracy. Complementing its optical prowess, a ring-type Ultrasonic Motor offers fast, smooth, and near-silent autofocus performance, which is further benefitted by full-time manual focus operation and an internal focusing design. The lens is both water and dust-resistant, and fluorine coatings have also been applied to the front and rear elements to protect against fingerprints and smudges from affecting image quality. Wide-angle zoom 16-35mm lens is compatible with full-frame Canon EF-mount DSLRs, as well as APS-C-sized models where it will provide a 25.6-56mm equivalent focal length range. Constant f/2.8 maximum aperture offers consistent performance and excellent light transmission throughout the zoom range. Two large-diameter glass-molded dual-surface aspherical elements and one ground aspherical element help to minimize distortions and spherical aberrations throughout the zoom range in order to maintain edge-to-edge sharpness and illumination.

• EF-Mount Lens/Full-Frame Format :
• Aperture Range: f/2.8 to f/22:
• Three Aspherical and Two UD Elements :
• SWC, Air Sphere, and Fluorine Coatings:
• Ring-Type Ultrasonic Motor AF System :
• Rounded 9-Blade Diaphragm: