Just over 9 inches long and 2.5 lbs., it's the smallest, lightest 400mm prime we've ever created. Superb S-Line optics deliver the sharpness, brightness and beautiful bokeh you expect from a prime lens. Powerful VR and outstanding handling let you move and shoot with the speed to match your subject. Add fast, quiet autofocus and premium weather sealing, and you have every advantage for capturing decisive views of birds, wildlife and action.