This standard single-focal-length lens has a wide aperture with a maximum f-stop setting of f/1.2, producing beautiful bokeh effects and a sharpness that transcends that of conventional standard lenses, and expands the potential range of artistic expression. The large-diameter, short back focus characteristics of the RF mount support a more flexible optical design, for unprecedented improvements in lens performance. An effective arrangement of ground aspherical elements and Ultra-low Dispersion (UD) elements suppress chromatic aberration, and provide outstanding image quality in all types of photos. Special Air Sphere Coating (ASC) technology further reduces the chance of lens flare or ghosting, which can ruin a photo. The RF50mm f/1.2L USM lens is one example of how Canon is breaking new ground in lens performance, providing the highest degree of expressiveness, operability and durability.