While full frame sensor camera have enjoyed the use of fisheye lenses for a century, the newly created APS-C sensor cameras have remained lacking. Use of traditional fisheye would work, but the entire circular area would be cropped.
Enter the Sigma 4.5mm fisheye. This lens is built for cropped sensors, giving them a full 180° field of view withing a single frame. To achieve this field of view, the front element protrudes from the front metal of the lens, giving it the typical fisheye look. There is a focus ring and a distance scale, plus a small switch for manual or automatic focus. Because of the short focus distance and the overall size of the camera, the nearest in focus object can be as close as .75”/`19mm.
With a lens like this, a …






