15mm F2.8 EX Diagonal Fish-Eye Lens for Nikon AF - New Addition!

"With the features you need to produce the sharpest results, Sigma's fixed focal length lenses are perfect for a wide variety of uses. Their wide and ultra-wide lenses can open an entire new way of producing pictures. This is a full-frame fisheye auto focus lens that fills entire 35mm negative with a full 180 degree diagonal field of view. This unique lens enables you to create a variety of unusual compositions even when shooting ordinary subjects. It accepts removable gelatin filters in a holder near the rear of the lens. The optical material used in this new lens are lead and arsenic free ecological glass."