The world's shortest focal length non-fisheye wide-angle lens with a fast F2.8 maximum aperture and a close focusing distance of only 7.1 inches

The world's shortest focal length non-fisheye wide-angle lens with a fast F2.8 maximum aperture and a close focusing distance of only 7.1 inches (18cm). The lens also incorporates a built-in lens hood and a gelatin filter holder behind the rear lens element. The AF drive for Sigma SA, Nikon and Canon feature the ultra-quiet Hyper Sonic Motor (HSM).