hello, i have a 5 inch external monitor that I would like to use for viewing photos I shoot while tethered to it. viewing only, not downloading to the monitor of course. there is a small plug on the monitor that says A/V and it is a single hole that looks a bit bigger than the headphone hole on an iPhone. how can I hook this up to my 5d? The 5d has a slot named ' A/V digital out ' that looks kinda like a weird USB hole. Any suggestions how I can join these two together with a long cord? What cord?