Sigmas 15mm F2.8 EX DG Diagonal Fisheye is a diagonal fisheye which means the distorted scene is shown full frame within the cameras field of view. It allows photographers to shoot creative images by taking advantage of the acute perspectives that are invisible to the human eye. The diagonal fisheye is the most popular kind of fisheye and are often used by wedding photographers who want to give an "artistic" looks to images, by underwater photographers who want to take in the maximum field of view possible and by scenic photographers.
A focusing distance of 5.9 inches and a magnification ratio of 1 to 3.8 allows the photographer to have fun with placement of subjects extremely near to the camera with distorted backgrounds. In the hands of an artist this lens can produce memorable, eye-catching images.
Amazon.comThe Sigma 15mm f2.8 EX DG Diagonal Fisheye Lens for Canon Digital SLR Cameras is a digitally optimized diagonal fisheye auto-focus lens. It is equipped with the latest in multi-layer coating technology that reduces both flare and ghosting. By taking advantage of both the distortion specific to fisheye lenses and the minimum shooting distance of 5.9 inches, the photographer can shoot error-free creative images.
By offering a 180 degree field of view, this fisheye lens can be used to create amazing image expressions that cannot be seen with the human eye, such as exaggerated perspective and distortion.The minimum shooting distance and large depth of field allow close up photography that covers the objects surrounding the photographic subject. The lens is supplied with a gelatin filter holder at the rear, allowing the use of gelatin filters.