The new EF200-400mm f/4L IS USM Extender 1.4x lens features a Built-in 1.4x extender to give an extended reach of 560mm. With the additional IS mode (mode 3), it gives the equivalent effect of a shutter speed 4 stops faster and is suited to suddenly occurring events.
To enhance the focusing experience during movie shooting, a Power Focus mode is featured to smoothly change to focus. A 2-step change in focus speed is available depending on the angle that the playback ring is rotated to. Throughout zoom range, the minimum focusing distance of 2 m remains constant even when using the built-in extender
