I actually missed this lesson because I was sunning it up at Sunny Beach in Bulgaria.  However this is something I have done before and feel that I have a pretty good grasp of it.

Whilst these aren’t the two best images I’ve ever taken I feel they demonstrate the two ends of the spectrum.

Shallow depth of field ISO100, f2.5, 1/40s

Wide depth of field ISO100, f16, 1/80s