Hi there everyone.
I have had my 40D for a good couple of months now and very pleased with the results it produces. I was reading the manual the other day and came across something i never noticed before, the Extension System Terminal, looks like a smaller version of a HDMI cable. It's on the bottom of the camera under the rubber plug. Can anybody tell me a little more about this terminal as i dont see any explanation for this terminal and what is it's function as there is nothing in the manual as far as i can see?
Canon 400D with battery grip, Eos 40D with timer battery grip, Sigma 17-70mm f2.8, Sigma 70-300mm F4.5, Canon 50 and 105mm lenses,580ex 11 and 430ex, ST-E2 Transmitter, Tamrac Expodition 8, Manfrotto Tripod and Mono Pod and all sorts of other gadgets.