All wide-angle focal lengths in a single high-quality zoom lens. Ideal for landscape, architecture, and interior photography. A focal length range of 11-24 mm offers an exceptionally wide perspective of the world. The EF 11-24mm f/4L USM is the perfect creative tool for landscape, travel, and architectural photographers and filmmakers right on set. Capturing images in tight interiors or of architecture is achieved without significant distortion. UD (Ultra-Low Dispersion) and Super-UD lenses ensure top-notch sharpness from the center of the image to the edges. Three different types of coatings minimize lens reflections and provide exceptional image quality. The ring-type USM of the EF 11-24mm f/4L USM enables fast and nearly silent focusing. The ability to manually adjust focus at any time allows for precise fine-tuning without taking your eye off the camera.