I'm new to shooting shows, but currently frustrated. I'm 0 for 3 in terms of getting any shots that I'm happy with, mainly because the lighting is from behind the stage and there's virtually no lights facing the performer. I know everyone has been suggesting bigger glass for shows, but seems to me that this lighting situation is probably fairly common, and no glass is gonna fix it. It's also seems to me that ANY type of flash will completely ruin the ambience of the shot.
Interested in your thoughts and a little bit more detail on what people's experiences are...at least more than just 'you need f2.8 or faster glass'...although in the end I suppose that may be the only solution.
EDIT TO ADD: I'm at 3200 ISO with my 50mm f1.8 wide open, and with exposure compensation set two f-stops overexposed. I'm going shutter priority with shutter speeds set at 1/60th or so...shots are still too dark. I tried working some photoshop magic, and the dark shots are improved, but way grainy and just not very good. I'm thinking that probably not much else can be done, although one thought is turning a flash around backwards and diffusing the flash to the max, but I'm afraid that will still wash the scene out.
Seems to me that the only answer is the give up if there's no 'in front of the stage' lighting.
SECOND EDIT: Yeah, I know...buy a 5D Mark II that goes to ISO 24000 or whatever and a f1.0 lens. Pffft.