I love the stuff you are doing with the E520.
The DOF is the first thing I noticed. Then I noticed its at f11. The 50-200 really holds together nicely at f11. I don't think I've ever went that far with mind. I'll have to loose the fear of the high f-stops numbers cause you did very well with it here.
Yep, using the EX25 thedepth of field is really narrow, so I'll close it down pretty far to keep there from being just a sliver of the image in focus, and shooting that close, even bouncing the flash, the FL50R is more than powerful enough to keep the ISO's low. At normal distances I'll usually not stop down past f5.6 when using flash.