Here is a quick question. I have only recently realized that my ISO has been set to 1600. This is pretty sensitive from what I understand. I also believe that it can cause some noise in night photos. I have a feeling this is higher than I need. Ok, here is the question: is it ok for me to lower my ISO to maybe 800 or so? Will i still have bright enough pictures? I am taking pictures usually w/ exposures between 1 and 6 seconds at night. I will probably test this out on my own anyway but I was just wondering your thoughts. Thanks for your help!