The Canon EF 17-40mm f/4.0 L USM Lens in black is a high-quality wide-angle zoom lens designed for Canon cameras. With a maximum aperture of f/4.0, it allows for excellent low-light performance and beautiful bokeh. This lens is compatible with Canon EF mount cameras and offers both auto and manual focus options, making it versatile for a range of photography styles. Its lightweight design at 475g makes it easy to carry around for spontaneous shots, while the zoom range of 17-40mm provides a wide perspective for scenic shots. NOTE: Slight lens fungus, see photos.