The Rokinon 10mm f/2.8 ED AS NCS CS Lens for Canon EF Mount is a prime, manual focus wide-angle lens designed specifically for use with APS-C sized image sensors. Providing a 35mm-equivalent focal length of 16mm and a broad 105.9deg. angle of view, this lens is ideally suited for interior, architectural and landscape photography applications. One extra-low dispersion element and two aspherical elements have been incorporated into the optical design to minimize chromatic aberrations and distortion in order to produce sharper images. Additionally, a Nano Coating System (NCS) has been applied to the lens elements in order to reduce surface reflections and prevent lens flare and ghosting for improved light transmission and more contrast-rich imagery.Prime wide-angle lens provides a 35mm-equivalent focal length of 16mm, making it ideally suited for indoor, architectural and landscape subjects.Fast f/2.8 maximum aperture benefits working in low-light conditions.Manual focus design permits selective control over focus placement.One extra-low dispersion element and two aspherical elements reduce chromatic aberrations and distortions in order to produce sharper images.Nano Coating System improves light transmission and suppresses lens flare and ghosting for more contrast-rich, color-neutral images.