The Canon BG-E2 Vertical Grip/Battery Holder adds a vertical shutter release, and is compatible with up to two BP-511, 511A, 512, 514 Lithium-ion battery packs, or six AA batteries with included battery holder BGM-E2. The BG-E2 provides additional shutter release, main dial, AE lock/FE lock and AF point selection controls for easier vertical shooting.