The Canon EF 400mm f/2.8 L USM lens is a high-quality telephoto lens designed for photography enthusiasts. With a maximum aperture of f/2.8, this lens allows for excellent low-light performance and beautiful bokeh. The focal length of 400mm delivers stunning close-up shots of distant subjects, making it ideal for wildlife, sports, and portrait photography. Built with Canon's renowned L-series quality, this lens is sure to impress with its sharpness and image stabilization capabilities.