Canon 200-400mm Lens to Include a Built-in Switchable 1.4x Teleconverter

Canon is on a tear today with its announcements. In addition to new Rebel cameras and new entry level flashes, they also have some lens news. First, they’re releasing new versions of their 500mm and 600mm lenses, but even more interesting is the EF 200-400mm f/4L IS USM Extender 1.4x lens they announced the development of. This is a zoom lens that has a 1.4x teleconverter built right in. Once you switch it on, it instant turns into a 280-560mm f/5.6 lens!