Thanks Jonathan - that's a beautiful illustration of DoF difference between the two formats and useful to have the data here rather than looking on Flickr. DoF is maybe a little exaggerated, as the FF shot is at a slightly longer than equivalent FL, as you comment above but in reality, engraved focal lengths are never accurate and change with focus distance anyway. Correct not to adjust position, just focal length of course. Nicely shows off the 5D qualities too.