Excuse my n00biness, but is it possible to change the shutter speed on the S400? If so, how? What is everyone's opinion on the Digital Rebel? I'm almost deadset on getting that camera as my next one. and finally Is there any camera that is especially good at taking macros that doesn't cost an arm and a leg. Or a camera that doesnt cost alot that you can get a good macro lens for? Thanks for any help.