The Sigma 15mm f/2.8 EX DG Diagonal Fisheye is a full-frame fisheye auto focus lens that fills the entire 35mm negative with a full 180 degree diagonal field of view. This unique autofocus lens enables you to create a variety of unusual compositions even when shooting ordinary subjects.
The improved DG lens coating reduces flare and ghosting, which is a common problem of digital cameras, and also creates an optimum color balance.
The 180 degree angle-of-view can only be obtained with full-frame DSLR cameras. Cameras with a crop factor will only use the center part of the lens, therefore, peripheral distortion will be very small.