Hey guys is the 622 a radio or wireless transmitter? Whats the difference anyways? In other words, is the connection between the transmitters/receivers (basically 2 622) strong? Can they be out of line of sight from each other and work fine ? (Optical slaves fail at this which I hate).
Also, can I control the parameters of my flash wirelessly with the 622 or do I have to walk to my wireless flash every time I change a setting? (the power output, zoom range etc ...).
I wonder if there is a transceiver that allows to control flash parameters directly on it rather then in camera menus? I read that yonguo made something like it for Nikon, but not for Canon yet. Am I correct ?