Hello. I recently purchased a 350D Rebel XT. It came with a Canon 18-55 lens. I purchased an inexpensive Quantaray 70-300 lens. I shoot alot of projects at school where there are performances on stage. I want to take the best pictures without a flash. There is not much stage lighting. I can't find a balance between pictures being bright enough and not blurry.

I also owna Sony DSC F-717 which I have used succesfully for years on Automatic with no flash. Most of the time the action, on auto, was frozen enough and the light was good.

How do I get the sharpest pictures with no flash in a (sort of) low light situation on stage?

Right now I depend on the 717 because I can't get the right combo with the Rebel XT. I knmow the Rebel is better. What Am I doing wrong?

Joe