The Samyang 12mm fisheye is a manual lens, with manual focus. It offers a diagonal angle of view of 180 degrees on a full frame (24 x 36mm format) sensor. In terms of the optics, it is one of the most advanced fisheye lenses. With excellent build and optical construction, it features 12 lens elements arranged in 8 groups including three elements made of low dispersion ED glass and two aspherical lens elements ensuring perfect image depth and minimizing chromatic aberration. It features highly effective NCS nanocrystal anti-reflection coating applied together with standard UMC coatings. It provides great focus, high contrast and natural color reproduction even shooting wide open it is an excellent lens for use in in diverse lighting conditions. Fisheye lenses are popular for special effects use where distortion, exaggerated perspective or extreme depth of field are desired. It is also capable of producing panoramas and 360 virtual tours, including full 360 degree images with use of various third party software, available from other vendors. It features a removable lens hood.