OVERVIEW
The Canon EF 24-70mm f/2.8L II USM Standard Zoom Lens (Black) is a standard zoom lens, designed for full-frame, Canon EF-Mount DSLR cameras. Though it is designed for full-frame Canon EF DSLRs, it can also be used with APS-C models, where it provides a 38.4-112mm equivalent focal length range. This L-Series zoom ranges from wide-angle to portrait length, & features a constant f/2.8 maximum aperture, which is beneficial when working in difficult lighting conditions, by allowing greater control over your depth of field.
The EF 24-70mm f/2.8 II USM Lens features a sophisticated optical design, which includes two UD Elements, & one Super UD Element, to reduce chromatic aberrations and color fringing, while improving color accuracy & clarity in your images. Three aspherical elements are featured, to improve sharpness, by minimizing spherical aberrations & distortion. A Super Spectra Coating was applied to individual lens elements, to control flare & ghosting, resulting in high contrast & neutral color fidelity. A rounded 9-blade diaphragm benefits the use of selective focusing techniques, by producing a pleasing "bokeh" quality in your images. The featured zoom lock is designed to secure the wide end, to maintain a compact physical design, while also protecting the lens when it is not in use. A Ring-Type Ultrasonic Motor & an internal focusing mechanism work together to provide a fast, quiet, & accurate autofocusing performance, as well as full-time manual focus override. The lens is also weather-sealed for protection against elements in difficult weather conditions.