The Samyang 16mm f/2.0 ED AS UMC CS ultra wide angle manual focus lens is specially designed for APS-C / Crop sensors. This fixed focal length offers first-class image quality. The perfect lens for landscape and nature photographers using cameras with crop sensors. Of course it is also an ingenious enrichment for all friends of wide-angle photography. The optical construction consists of 13 elements in 11 groups. Of these, 2 are aspherical lenses and one ED (Extra-low Dispersion) lens. Unwanted lens flares are reduced by the UMC (Ultra Multi Coating) and prevent the so-called "ghosting". With a filter thread of 77mm, screwing on ND, UV or polarizing filters is no problem. Focusing is done manually, which works precisely due to the smooth-running focus ring. In addition, the close-up limit of only 0.20 m is so low that nothing gets out of focus so quickly.