Sigma 8mm F3.5 EX DG Circular Fisheye Lens for Canon DSLR Cameras Designed for use with full frame digital SLR cameras. Produces striking images with exaggerated perspective of near subjects and extreme barrel distortion of the surrounding areas Super Multi-Layer lens coating reduces flare & ghosting & assures high image quality throughout the entire zoom range The minimum focusing distance of 5.3 inches & a magnification ratio of 1 to 4.6 allows subjects to be as close as of an inch from the lens' front element Supplied with a gelatin filter holder at the rear for easy addition of color correction filters A front cap adapter, front/rear lens cap and carrying case are included with the lensSpecifications