The Tokina AT-X 107 is a fish-eye lens that is designed especially for a Nikon camera. This lens provides a dramatically curved field of view effect with both auto and manual focus. This Tokina lens for Nikon allows users to capture more imagery in one frame than the human eye can see normally. It is an unusual lens used for very specialized, creative photography. The front of the 17 mm f/3.5 lens has a waterproof optical glass that allows for easier cleaning. The rear aspect of this Tokina AT-X 107 has a super-low dispersion glass element that limits the number of elements required in the optical lens and enhances the speed at which focusing occurs. It also reduces the overall weight of the lens. This Tokina lens for Nikon is designed especially for DSLR cameras. This 17 mm f/3.5 lens features a minimum focusing distance of 5.5 inches and a maximum outer diameter of 2.75 inches. It has a focal length of 10-17 mm. This Tokina lens for Nikon has a length of 2.8 inches and a diameter of 2.8 inches, and it weighs 12.35 oz.