Hmmm. You can separate out your focus from your shutter button. It is similar to focusing and recomposing where you press the shutter halfway and then recompose while holding it, but instead of that, I have it assigned to a button on the back of my camera. I simply press that button and then can recompose the shot before I press the shutter button. It holds the focus where I wanted it but allows me to still adjust things for proper exposure.