The world first short zoom lens starting from wide angle of 35mm at the time. A newly developed two-lens-group zoom system achieves the picture quality as high as that of a single-focal-length lens. This lens is a pioneer of Canon’s many short zoom lenses coming after this lens. This lens is equipped with many features, such as a large aperture of f/2.8-3.5, 2x zoom ratio appropriate for general use, macro mechanism for close-up photography at 0.3m focusing distance. The name of this lens will remain in the history of modern optics.