The Digital Picture have a review of the Canon BG-E4, a battery grip designed especially for the new Canon EOS 5D DSLR camera.

“The Canon BG-E4 Battery Grip costs significantly more than its Canon battery grip predecessors, but it is more ruggedly built. Like the EOS 5D, the BG-E4 body construction has magnesium alloy incorporated into it for strength. The only attribute I don’t like about the BG-E4 is the too-square grip. Although others didn’t seem to mind it (or really liked it), I found the too-squared edges to be slightly uncomfortable. But not as uncomfortable as holding the 5D in portrait orientation without the grip installed.

The surface of the full-size portrait grip is rubberized for sure handling. With the Canon BG-E4 Battery Grip installed, larger lenses are much easier to control and portrait oriented shot are more comfortable to take. If you own a Canon EOS 5D Digital SLR, consider adding the Canon BG-E4 Battery Grip to your kit.”

Website :  Canon EOS 5D BG-E4 Battery Grip Review at The Digital Picture