The RF10-20mm F4 L Is Stm is a unique ultra-wide-angle lens that gives you corrected, rectilinear coverage to an incredible 10mm with full-frame cameras. Great for still photography and videography, the 10mm ultra-wide-angle effect is outstanding for its dramatic look, lending visual drama to your landscape, interior, architecture, travel, and even photojournalism images. This lens features true L-Series quality with optical and digital corrections for distortion, and optical image stabilization (Ois) for better low-light performance, especially when shooting video. Autofocus is handled by a tried-and-true Stm-type focus motor which actually allows the overall lens design to be more compact while still providing rapid Af and smooth focusing during video recording.Modern DesignThe design of this lens is geared toward getting the job done efficiently with light weight, fast focusing, image stabilization, and a programmable control ring.