Fast f/3.5 aperture Fisheye optical effect Extremely wide field of view The Sigma 8mm f/3.5 EX DG prime lens produces the optical fisheye effect from an extremely wide field of view, making it perfect for videoing and photographing extreme sports and creative photoshoots. The robust EX build also means the lens is capable of shooting outdoors in unfavourable conditions, and the DG designation allows the lens to function on APS-C and Full Frame DSLRs. The Sigma 8mm f/3.5 EX DG is perfect for the creative photographer wanting the fisheye effect from a lens with the capacity to take professional-level images.