A versatile wide-angle zoom with advanced optical design and constant f/4 maximum aperture, the EF 11-24mm f/4L USM is suited to landscape and architectural photography, covering ultra-wide to wide-angle perspectives throughout the zoom range with professional optical build and intuitive handling. A truly creative tool for landscape, and architecture photographers and cinematographers, this lens is relatively compact and can be transported with ease when working on location. Part of the Canon professional L-series flagship range, its designed for robust handling and resistant to dust and moisture.