The EG-E6 Battery Grip is dedicated strictly to the EOS 5D Mark II, and permits one or two LP-E6 battery packs to be installed. With two packs, the battery life is doubled, compared to using a single LP-E6 pack in-camera. Especially for extended use of the EOS 5D Mark II's movie mode or Live View, the BG-E6 is an outstanding accessory. The BG-E6 provides full vertical shooting controls, which can be independently turned on or off as the photographer desires.
I purchased this grip while my Canon EOS 5D Mark II was still on preorder. In fact, it arrived a week before the camera did. I did this because I fell in love with the feel of a vertical grip a long time ago, and every camera I've had since then has had one added almost immediately (including: EOS Elan IIe, D-Rebel 300D, 30D, and 40D). The grip is a real benefit to those like me that have big hands, since all of your fingers can now rest against the camera instead of curling … more