How do digital cameras perform in low light. Like early evening when the sun is down low in the sky, or indoors (concerts, some sporting events, etc), with no flash. I know I could use a slower shutter speed, but I don't want to use a tripod, and some of the action may be quite quick. For a film camera I can increase the film speed (400, 800+) to get around this problem. I am thinking of getting a Cannon A-80. Any help would be appreciated.