Thought it would be nice to start a thread for those of us who own the Canon Digital Rebel (or 300D) to share tips, etc. I've had mine since October, but have only started using it more because of the better weather. Is anyone using the 550EX external flash? I have used a Sunpak flash that I've determined is safe to use with the Canon, but am having some trouble getting consistent exposure with the flash's auto setting. The best I've been able to do is set the ISO on the flash one stop faster than the ISO on the camera. Normally I would have purchased the 550EX, but I read an article stating TTL flash exposure is not mandatory nor ideal, so I decided to try the Sunpak I had from my old system.