I did factor in the f8 aperature. I'm sure the full frame vs. the crop sensor body enter into this somehow and not sure which was used here(Don't know my pro-bodies). Anyway, think I'll post in another section and see what info I can glean from our astute membership.
I was using a 5dIII. I went to several online DoF calculators and they all indicated a DoF of .04-.05 ft. Or about 1/2" as you stated. I'll try to measure the distance (the chair is still in same spot, as are the flowers), but pretty sure it was around 9 feet.
Edit. Measured. If I was leaning back in he chair, the distances from the front of the lens (working distance) to the flowers and/or perches in the shots are all between 9 and 9.5 ft.
Moose, you're definitely the man!
