I know how changing the aperture works, what it's supposed to do. Putting it into practice is another matter entirely. Does distance have anything to do with it? If you're trying to focus on an object close and want the background blurry, you'd use the smallest f number possible for your lens. What about when your subject is farther away? Would you close down the aperture? I'm having a really hard time understanding depth of field (putting it into practice anyway, I understand the concept). I've been trying to use Av mode on my camera more so that I can understand more about aperture. The problem I'm having is that a lot of the time, the pictures come out more blurry than they should since the shutter speed isn't too low, though this could be a focus problem, I'm trying to determine that with my question. I'm wondering if I'm consistently opening up the aperture too much or if my focusing is just really crappy.