Canon 11-24mm f4 L USM

A truly versatile wide-angle zoom that offers an advanced optical design and constant f/4 maximum aperture, the f11-24mm Canon EF/4L USM is a member of the esteemed L-series of lenses designed for full-frame EOS DSLRs. One Super UD element and one UD element offer a significant reduction in chromatic aberrations, while four aspherical elements help minimize distortions throughout the zoom range and provide consistent edge-to-edge sharpness and lighting. Both SWC and ASC coatings have been applied to the elements in order to reduce lens glare and ghosting to increase contrast and color accuracy. Ideal for landscape and architectural photography, this lens covers ultra-wide wide-angle perspectives and supports its versatile zoom range with sophisticated optics and intuitive operation. As far as focusing performance is concerned, an ultrasonic motor ring type offers fast, smooth and near-silent autofocus, which further benefited from full-time manual focus operation and an internal focus design. The lens is both water and dust resistant coatings, and fluorine has also been applied to the front and rear elements to protect against fingerprints and smudges affecting image quality.