I normally only shoot sports (with a D300) using available light. I've been asked to do an indoor group shot (in a basketball gym of about 20 people) and would like to try using a flash (SB 800). Could anybody provided me with suggested settings (both camera and flash) for such a shot? Also, should the flash be off the camers to reduce harshness and avoid redeye? Any suggetions would be greatly appreciated. Thanks in advance.