A truly versatile wide-angle zoom featuring an advanced optical design and constant f/4 maximum aperture, the Canon EF 11-24mm f/4L USM Lens is a member of the esteemed L-series of lenses designed for full-frame EOS DSLRs. One Super UD D ignificant reduction in chromatic aberrations while four asrical minimize distortions throughout the zoom range and provide consistent edge-to-edge sharpness and illumination. Both SWC and ASC coatings have been applied to the to reduce lens flare and ghosting for increased contrast and color accuracy. Ideally suited for landscape and architectural togra, this lens covers ultra-wide to wide-angle perspectives and backs up its versatile zoom range with sosticated optical components and intuitive handling.