The Canon BG-E11 Battery Grip isan optional battery grip with improved ergonomics designed specificallyfor the Canon EOS 5D Mark III, 5DS, and 5DS R. It allows users to load achoice of one or two LP-E6 battery packs. With two packs, the already-impressive battery life is doubled, compared to using a single LP-E6 pack in-camera. This is especially useful when taking advantage ofthe camera's movie mode or Live View mode - operating modes that use more power. In addition, with the included battery magazine, you can also run the camera off six AA batteries.

The BG-E11 also provides full vertical shooting controls, which can be independently turned on or off as the photographer needs to enhance camera handling, especially for shooting vertical pictures. It has a large number of operating controls as well: shutter button, Main Dial, multi-controller,AF point selection button, AE lock/FE lock button, AF start button, andmulti-function button.