Part of Canon’s high quality L-series of lenses, The EF 24-70mm f/4L IS USM Lens from Canon is designed for full-frame 35mm sensors. It provides two Super Ultra-low Dispersion (Super UD) as well as two standard UD lens elements – these work together minimize chromatic aberrations, and reduce color blurring around the edges of your subject. These two types of aspherical elements are incorporated in the lens to aid the reduction of spherical aberration over the whole image area and the full zoom range. Furthermore, its lens coatings help provide exceptional color rendering while virtually eliminating ghosting. The lens also features improved dust and water resistance to protect it from damage. To keep fingerprints and smearing to a minimum, the lens has fluorine coatings on the front and rear lens.
Its ring-type Ultra Sonic Motor (USM) and high-speed CPU, with optimized AF algorithms, provide the user with high- performance. You experience quick, quiet and precise autofocusing whenever you desire. The circular nine-bladed diaphragm delivers beautiful, and natural looking, soft background effects. Finally, a zoom lock lever holds the zoom position at the 24mm wide end for safe travelling when attached to an EOS DSLR camera over the shoulder.