Canon lens EF 16-35mm f/2.8L II USM, water resistant, and ultra wide-angle Canon L-series lenses. It has been designed specifically to enhance the image quality that will meet the strict requirements of the professional amateur photographers. Has three high-precision aspherical lens elements, each of a different type: ground, replica and transgenic for even better image quality than f/2.8L USM 16-35mm EF original. USM Ultra Sonic Monitor, weight 635g, 82mm filter.