I'm not very technically minded so am a bit overwhelmed with trying to figure out the settings. Right now it's set at Auto-ISO, which means it automatically adjusts to whatever ISO setting is needed depending on the light situation. My own camera only goes up to ISO-1600, and the photos are usually very grainy. My SIL's camera goes all the way up to ISO-6400, so what better time to try it out than on a dark rainy day. So I shot our tree....