RTodd:I am a very part-time photographer (because I suck at it and lack the patience) and dive regularly with GUE instructors that are shooting photos. As covered below, photographers are less aware of their buddies no matter how good they are in the water. However, since photography in the DIR world is a team event the other teammates just take a more active role in team communication and awareness. More pre-dive planning is involved. In a two man team (not optimal for photography) one means of keeping the team in better communication is to use the other buddy as the model. (It allows the photographer to focus on the subject and his buddy.) A third member (which can "rotate" duties with the other non-photo teammate) to help keep the team together is the best solution. Otherwise, it takes a buddy that is willing to sacrifice a fair amount of their dive actively communicating with the photographer. I have found other photographers tend to better understand the need to do this (but only if they themselves don't have a camera on that dive.)
All of this still requires the photographer to have the discipline to react immediately if he is not receiving the active communication form the other teammate. All new photographers and most more experienced photographers are fairly deficient in this area as it is very easy to become competely focused on the photos.
A three man team does seem to address (to a reasonable degree) the concern about buddy awareness. Does this mean those of you who shoot photos tend to avoid two man teams? Also, would you ever dive a two man team with both members shooting photos? This would seem to pose serious issues wrt buddy awareness, yet I often see (I assume non-DIR) buddy pairs with both members shooting. That said, having a three man team supporting a single diver just so he can snap a few photos on an easy 30ft reef seems a bit overkill. More curious about what is done in practice, than what would be recommended (where the three man team does seem ideal). Again, I am NOT shooting photos myself, so just interested in what is being done by DIR divers.