I just noticed something. Maybe it's because I do mainly portrait, and usually in situations where there is low light, but I always shoot at a low f-stop (below 5.6). It let's in more light so I can shoot with a faster shutter! It puts the object in focus and creates a greater DoF. Why would I choose to move up? What's the trade off from shooting at f11 and f5.6? What's a situation where you would use f11 vs f5.6? I know, some rookie questions - but this IS the beginners forum right?