This lens is a versatile choice for travel, landscapes, portraits, and distant subjects. It’s extremely lightweight and portable, making it easy to carry around. Constant f/2.8 maximum aperture offers consistent performance and excellent light transmission throughout the zoom range. Full-time manual focus operation is available for fine-tuning of your focus position when working in the AF mode. It comes with 9-Blade Diaphragm. The EF 16-35mm f/2.8L III USM is an indispensable ultra wide-angle zoom lens for professional and enthusiast photographers who demand superlative operation and performance, in virtually any condition. Its 16-35mm focal range provides superb control of perspective, helping you capture pictures and movies with amazing, dramatic compositions limited only by your imagination.