Canon EF 24-70mm f/2.8L II USM

This constant aperture Canon zoom is constructed of 18 elements in 13 groups and utilizes 1 Super UD lens element and 2 UD lens elements. Two types of aspherical lenses are combined to help reduce spherical aberration over the entire image area through the full zoom range, plus optimized lens coatings are used to minimize ghosting. The lens is equipped with a circular 9-bladed diaphragm and a ring-type USM and high-speed CPU with optimized AF algorithms to enable silent and fast autofocusing. It is constructed with improved dust sealing and water resistance with fluorine coatings on the front and rear lens surfaces.