Canon RF 28-70mm f/2L USMA truly versatile zoom lens with its large aperture of f 2 that inherits the consistent high image quality from prime lenses across its focal length. Delivering highest standards of descriptive performance at wide open aperture truly provides you the convenience of performing the work equivalent to a few prime lenses. The bright aperture of f 2 makes this RF28 70mm f 2L USM ideal for those seeking for low light capability and amazing background