A contemporary take on the classic fast standard zoom, the Panasonic Lumix S PRO 24-70mm f/2.8 is an L-mount wide-angle to short-telephoto lens characterized by its constant f/2.8 maximum aperture and sophisticated optical design. Aspherical, UHR, and ED elements are used to produce well-corrected imagery with high sharpness, accurate color rendering, and notable clarity throughout the zoom and focus ranges. Complementing the optics is a double focus system, which utilizes both a linear motor and a stepping motor, to provide especially fast and precise focusing performance. Additionally, the lens sports a weather-sealed design for use in harsh conditions and a rounded 11-blade diaphragm contributes to a pleasing bokeh quality with smooth transitions between the in-focus and out-of-focus regions of the image.