Canon 16-35mm F/2.8L II Lens is a high performance water resistant and ultra wide-angle Canon L-series lenses. The Canon 16-35mm F/2.8L II Lens has been precisely designed for improved edge-to-edge image quality that will meet absolutely the requirements of professionals and high-end amateur photographers. The Canon 16-35mm F/2.8L EF Lens incorporates 3 high-precision aspherical lens elements having three different type: ground, replica and GMo which effectively correct the lens aberrations, that occur during zooming and for better image quality than the original Canon EF 16-35mm f2.8L USM lens. The circular aperture of Canon 16-35mm F2.8 Lens, produces an excellent and natural background blur when shooting at wider apertures. The Canon 16-35mm EF II Lens includes internal focusing, a ring type USM (Ultra Sonic Motor), and new AF algorithms for fast and quiet auto focusing.