A professional L-series 200-400mm f/4 lens with a built-in 1.4x extender that boosts focal lengths to 280-560mm, perfect for photojournalism, wildlife and sports. A high-performance super-telephoto zoom, the four-stop Image Stabilizer maximises sharpness with instinctive controls for enhanced handing. The use of magnesium alloy adds strength and durability without increasing the weight and the 1.4x extender is located at the base of the lens, applied with a simple lever switch. Part of the Canon professional L-series flagship range, its designed for robust handling and resistant to dust and moisture.