The Canon EF 14mm f/2.8L II USM ultra-wide angle lens has an impressive 114¢X diagonal view angle and it features completely redesigned optics including 2 high-precision aspherical elements and 2 UD-glass elements, the result is reduction in chromatic aberration, better contrast and sharpness at the outer edges. The lens uses a rear focusing system, high-speed CPU, and a powerful ring-type USM with improved electronics for faster, more responsive AF.