A great sensation for the optical world, this super telephoto full-frame stabilised zoom lens opens a new era for professional optics. The Canon EF 200-400mm F4L IS USM Extender 1.4x has a built-in teleconverter, that allows the photographer to switch to extended focal lengths in just a second. As the teleconverter is integrated into the design of the lens it can be activated safely in harsh conditions without exposing the camera’s mirror and sensor. With the converter in place the lens becomes a 280-560mm F5.6, but for those who need even greater reach this optic is compatible with Canon’s Extender EF 2x III. Although for the enthusiast this is an extremely expensive lens, its ultimate optical quality guarantees uncompromised results for sport and wildlife photography.