There is a discussion on the fpv thread from a guy asking about lag between fpv and the actual flight position and view and also on a good phantom to go for to use with goggles as he was thinking of buying both. He has received some info on best camera/phantom and goggles but next to nothing on any possible lag between fpv and the phantom particularly for the P2v+, apart from a brief comment from me about there being no discernible difference in lag whether the phantom is a couple of metres away from home or a few hundred metres away. I'd checked that by synching the videos at the start of a flight from fpv on vision app and the camera video in a composite videos and the pair remained in sync for the whole flight. See http://youtu.be/tx2goZRycRU Someone on the fpv thread suggested asking the question about lag on this forum as it was a lot more active than the fpv and that he might get a response. So here goes, let's see if any expert on this forum has done some work on the lag question and can enlighten the rest of us.