Alright so I understand the whole exposure triangle thing. I know that if you adjust shutter speed then you also have to adjust the aperture or iso, and vice versa. But what I don't quite get is how to tell if the exposure you have is the correct one for your situation. Some instances I find the picture comes out better if it's a little over or underexposed. Is this the correct way to do it or should I get the meter as close to the middle as possible at all times? For example, say I'm shooting under a canopy under the shade. It's a little darker here than out in the sun. So to make up for that added darkness I overexpose it just a little so that I can get a better image. Is this ok or am I breaking the rules?