This super wide-angle lens lets you take pictures with wide-angle cameras with digital SLR single lens, which have a screen size less than that of a 35mm camera and a cover that ranges from that of a 17mm wide-angle lens to that of a 40mm standard lens. Three aspherical lens elements, available in two types, ensure the broad area of focus that high image quality, while Super UD lenses provide excellent correction of chromatic aberration due to magnification. The effect of flare and ghost images have been minimized to offer the same features of the EF16-35mm f/2.8L USM. The circular aperture diaphragm, which offers a fuzzy blur, and the achievement of a minimum focusing distance of 0.28m throughout the zoom range is not only facilitate the compositions, but rapid fire and silent and extraordinary construction dust and Drip*,