Canon Battery Grip BG-ED3

The BG-ED3 combines the functions of a high-capacity battery pack with a vertical grip. Its dedicated set of controls (shutter button, main dial, AE/FE Lock button, and AF frame-select button) allows you to take portrait shots with the same ease as horizontal shots. It can hold one or two BP-511 battery packs to provide approximately twice the shooting capacity of the camera alone. Works with Canon® EOS-10D, D30 and EOS-D60 digital SLR cameras.