I am noticing that I am having a problem with focus. My images are not as sharp as they should. I am using a 550D with either a 85mm 1.8 or 50mm 1.4. On the 85 I generally do better but nevertheless. Any advice for the new guy? By the way I have tried to switch to a single AF point (and perhaps recompose if nesessery, that rarely helps). I do not want to use the "green box" shame on me for even bringing it up 



