I'm having trouble taking night shots with my new Rebel XTi/18-55. Under the automatic portion of the wheel, using landscape, no flash, and night portrait, the exposure times are long and I can't avoid camera shake. In addition, the photograph ends up being much brighter than the actual conditions. I've been playing with the advanced portion of the wheel, adjusting shutter speed and ISO, and I'm getting close, but even with the ISO maxed at 1600 the exposure time is still too long, resulting in camera shake. I'm willing to put the time in to learning how to take these shots, but the thing I don't understand is that my point and shoot Powershot A70, set to full auto with the flash disabled gets it right the first time with a fast shutter speed and no camera shake. I don't understand how a camera with a much smaller lens and aperture can take better pictures in low light. I need helpful suggestions, please.