I fully understand DOF, what I cant understand is I only get the front of the image doing this on 70-200, I have several lenses that are as open as the 70-200 and never get the same effect.
The background on the Zebra photo was the effect I was after and opened the lens fully.
Im in the process of uprgrading bodies, Im currently looking at the 7d and the 5d mkii as I mainly shoot weddings im heading towards the the 5d.
Many thanks for your input.
Paul