Hello, I use the same grip but have a problem with it. While the grip works (meaning it provides power to the cam), It can't read the battery info (I use 2 new Canon original batteries, registered to the MKIII, never had a problem with those), upon start the cam says once: cannot communicate with camera, use anyway? During shooting the battery level just shows as empty and battery info states: cannot communicate for left and right unit! :-(
Help, anyone?!
Thanx for your input, Marc