Hacking the Canon BG-E3 battery grip
When purchasing my Canon Rebel XTI (a.k.a. “Canon EOS 400D” in Europe or “Canon EOS Kiss Digital X” in Asia), I also ordered the Canon battery grip BG-E3. When I was playing with the camera for the first time in a shop I found that (compared to the EOS 20D/30D/40D), the body of the XTi is too small for my hands. Not that I have huge paws, but it just felt too unhandy, especially using some of the heavier lenses, e.g., the Canon EF 100-400mm f/4.5-5.6 L IS USM.
So, when buying the BG-E3, I also got a better grip for the camera – it’s a great enhancement for the handling, not to mention the vertical shutter button and of course (the main reason for a battery grip) extended battery life when using two Canon NB-2LH batteries inside the grip instead of only one in the camera.