The 16mm f/2.0 ED AS UMC CS Lens for Canon M from Samyang is a manual focus, wide-angle lens compatible with APS-C format (DX) DSLR digital cameras. It provides an 83.1° angle of view which translates into a 35mm format equivalency of 24mm. Its fast maximum aperture of f/2.0 is effective in low light shooting and provides shallow depth of field. With two aspherical lens elements and one extra-low dispersion element, chromatic aberrations are minimized and sharp, color-accurate images are the result. UMC lens coating facilitates even light transmission and reduces ghosting and flare. Wide angle focal length equivalent to 24mm in the 35mm format .Fast f/2.0 maximum aperture for effective low light shooting and shallow depth of field .Aspherical and Extra-low Dispersion lens elements reduce aberrations .UMC lens coating allows even light transmission and minimizes ghosting and flare.