Newbie question. I've just recently started getting more serious about photography. I have a Canon XSi with standard lens (and a 55-250). I also recently got a tripod with remote shutter trigger for low-light photos. It seems like everytime i take a photo at night, or in real low-light situations, the pictures are, i guess you'd call it grainy, and not very clear. Can this be fixed with settings on my camera?, or would i need some type of special equipment? Looking for advice on how to get better low-light picture quality, what do i need to know? Thanks in advance.