I am new to digitai photography but not new to video. I am a video editor (non-linear editing) by profession. Yesterday, in my photography club meeting a member who owns a Fuji S2 claimed that he uses grey card for white balance and works better than a white card. I was surprised because in video its the white card and I thought that white balancing is a process where we tell the camera to see a white object as white for that particular lighting. I tried the search function but did not get any answer. Can any one explain the working of white balance or lead me to a link on the web?