The RF 28-70mm f/2L USM offers all the optical, mechanical and electronic advantages of the EOS R system. You get exceptional image quality with superior sharpness and low distortion. The advanced ring-USM motor enables fast and virtually silent focusing. In combination with the "quiet shooting" technology of the EOS R system, photographers can work extremely unobtrusively. The high speed of 1:2 allows shorter exposure times, freezes subject movements and reduces camera shake. The RF 28-70mm f/2L USM is ideal for creating an attractive background blur to emphasize the pin-sharp subject. The RF 28-70mm f/2L USM features a configurable lens control ring that provides an intuitive response for adapting to changing shooting conditions - including aperture, exposure time, ISO and exposure correction settings.