If you are talking about dof, to figure it you need the lens mm of the shot, the F stop and the distance from the subject.

I am not sure to what your question refers.  Yes, as it should be his face is in focus. Focus does drop off from the shoulders back.    For all of him to be in focus you need a larger aperture number(smaller opening), meaning less light will be getting in but the dof will be deeper.

With flash you can get away with f/8 or similar quite easily if you want more in focus.

I like the bw, btw.       TomDart.