Try working in the f5.6 or 7.1 range for awhile and work it down as you get use to the dof. At 19mm, f3.5 I cant imagine that the dof is more than a few inches at most. I could be wrong, since still a newb.sometimes seems one eye is in focus and the other not?
vtf: no I haven't done anything with them. Focus is my weekest point especially with kids; so I am working on it. This is my son so easy access