What's the difference between long exposure and slow shutter speed? I mean, when I put my camera in long exposure mode, obviously the shots come out overexposed unless I'm taking them at night, but what about those pictures of running water, you know, that are slow shutter speed? Is it possible on a Canon Powershot SD300 to change shutter speed? Or can I not take pictures like that except at night? I don't think I phrased what I was trying to say very well, but I hope someone understood that haha.. Thanks so much!!