EF 16-35mm f/2.8L II USM, an ultra-wide angle f/2.8 L-type zoom lens, adopts a new 16 elements in 12 groups optical design for delivering superior image quality. Featuring 3 types of high-precision aspherical lenses, the combination provides excellent peripheral image quality in wide-angle shots. Two UD lenses are incorporated to compensate chromatic aberration, ensuring sharp and high quality image over the entire shooting range in superior contrast, resolution and color fidelity.