Im going to a MMA fight tomorrow (MIXED martial arts) I have a canon t2i camera.I want to take really good pics of the event, its a indoor place, its kinda dark but the caged fight is on a stadium and there are alot of spotlights. but in the audience area the lights are very dim..Which exposure should I set my camera in so i can take a clear shot, not pictures that have alot of motion. what exposure and aperture should i set my camera in? Thanks