Ultra-wide and stabilized, the Canon RF 14-35mm f/4L IS USM is a uniquely versatile zoom characterize by its broad range, constant f/4 maximum aperture, and advanced optical design. Gaining a bit on the wide end, this zoom offers a broader field of view to suit landscape, nature, and architectural applications, and its modest maximum aperture also contributes to a sleek, highly portable design for walkaround shooting. RF-Mount Lens/Full-Frame Format Aperture Range: f/4 to f/22 Three UD Elements Three Aspherical Elements Air-Sphere and Fluorine Coatings Nano USM AF System Optical Image Stabilizer Customizable Control Ring Rounded 9-Blade Diaphragm Canon RF-mount ultra-wide zoom for full-frame mirrorless cameras, 14-35mm focal range with constant f/4 aperture, optical image stabilizer for handheld shots, Nano USM for fast quiet autofocus, customizable control ring, rounded 9-blade diaphragm for smooth bokeh, three UD and three aspherical elements with Air-Sphere and fluorine coatings.