I think my 50mm 1.4 Canon lens is either not focusing spot on or Im doing something wrong. Is there some kind of test I can do at home check the lens focus. An example is of my little girl sometimes the eyes aren't quite sharp and sometimes her checks look real soft. Im at work so when I get home I will post what Im talking about. Oh and the f-stop is around 6 so its not like Im shooting wide open. Any ideas?