In regards to the first two, I think you need to move a little bit lower to really be at her level. In fact, I'd almost move below her eye level. Alternatively you could flip the bill and shoot entirely above her, pointing down, and letting the shadow do it's work in the water. Just some things to consider. I don't usually think about this stuff at the time much.
Originally Posted by rwboyer
If you don't have the light, the background is too busy, and can't really get the shot you want, then I'd just say forget it.
Stop worrying about grain, resolution, sharpness, and everything else that doesn't have a damn thing to do with substance.