The Rokinon 8mm f3.5 CS II Fisheye is designed for APS-format Canon EOS cameras, though it can also be used on full frame cameras. On a crop camera, it provides a distorted fisheye perspective from edge to edge; on a full frame camera, you can get a nice round image by removing the lens hood. Smooth manual focusing, good diaphragm, clean glass. Includes front and rear caps.