I had a revelation this morning when I woke up from a dream.... I was photographing a weird bird in Florida but none of the pictures I took turned out good at all. My white balance was set to sunny day because there was not a cloud in the sky, but I never changed my aperture...I know that must be the reason it didn't turn out, but my question is this: Is there something to kind of use as a rule of thumb with the aperture scale? Even if I would have remembered to change my aperture, I have no idea what I would have put it at...I would probably bracket and hope that one of the three was the correct exposure. On a sunny day, would I want less light entering because its so sunny? Ahhhh I am so confused. Please help! Just when I thought I was finally understanding the photographic triangle AFTER reading and re-reading Understanding Exposure, but now I am just feeling confused again. Thanks Everyone!