I remember a conversation I had with a friend years ago while we were in Glacier Park. I was taking pictures and the sun wasn't out. I think it was actually raining. He said you can't get a good picture if the sun isn't out, you're just wasting film. I never thought that was true, but it sure doesn't hurt to have the sun out. I think of that conversation all of the time now when I'm taking picutes no matter if the sun is out or not.