OK, I really feel like a novice here. I shoot a LOT of photos, but they are mostly stage/theatre/dance events with no flash. I also do quite a bit of studio work with strobes. I am using a D2x, SB800 and usually the f2.8 17-55. My question is shooting outdoors or maybe a wedding with 3 SB800's firing, where there is a lot of light. I took some headshots in bright sunshine with a flash to fill in the shadows. Ideally I would like to shoot at f2.8 to keep the background out of focus. When I do, the highlights always seem to be blown out. I try to use Aperture Priority Mode, f2.8, ISO 100. I have tried dialing the exposure compensation to -3.0 which seems to work a bit. To get a decent picture, I have to got to f5.6 or f8 or higher. Any suggestions out there? This is a new area for me!