Hello everyone.. I hope someone can give me a few pointers.. Ok, so here is my equipment.. Canon Rebel XT, with a Sigma DG 70-300mm1:4-5:6 lens. I'm very much a beginner with this being my first EOS digital camera. I have tried everything to take a great picture at a nighttime football game, but have failed. I've tried to sports mode, the nighttime mode, auto mode.. I still end up with dark, blurred pictures. Do I need something else? Is my lens just that crappy? Or am I just that bad of an amateur??? I really haven't been able to take good pictures of a football game in the daytime either.. Something about the motion..