The Phottix BP-40D grip features new sealing material around the battery compartment to better resist water and dust. The new model replaces the original BG-E2 grip and is compatible with the Canon EOS 20D, 30D, 40D and 50D Digital Cameras.
The Phottix Battery Grip BP-40D adds a vertical shutter release, and is compatible with up to two 511A Lithium-ion battery packs, or six AA batteries.
* Can take 6 AA batteries or 2 BP-511A batteries
* Expressly for the Canon EOS 20D, 30D, 40D and 50D
* Duplicated control buttons
* Better grip allows comfortable use in any position