The Canon EF 24-70mm f/4.0L IS USM Standard Zoom Lens is perfect for full-frame DSLRs.The lens covering wide-angle to short telephoto focal lengths and featuring a constant f/4 maximum aperture. An advanced optical layout comprises two ultra-low dispersion elements and two aspherical elements to minimize a variety of aberrations and distortion in order to realize notable sharpness and clarity. A Super Spectra coating has also been applied to suppress lens flare and ghosting for greater contrast and color accuracy.
The lens is also characterized by its ring-type USM and internal focusing mechanism to enable quick, quiet, and precise autofocus performance along with full-time manual focus override. A dedicated macro position also enables focusing as closely as 7.9″ away in order to achieve a 0.7x magnification for photographing close-up subjects. A four-stop-effective Image Stabilizer is also used to minimize the appearance of camera shake for sharper handheld shooting. Additionally, this lens is weather-sealed and has a protective fluorine coating on the exposed elements for use in trying environmental conditions.