In reply to Mark Savage:
Against those figures I have a rather disappointingly 'film' attitude which means I'm only managing ~1000 shoes per year with my main body, but then it's a hobby, not a profession, and I'm having to 'train' myself to take multiple shots at any given setup to insure against AF variability, plants blowing around, water on the lens and/or filters, the tripod and camera being bodily moved around by the wind, etc, etc - all things I've had to contend with over the past few weeks!
I imagine that actuation count is going to increase somewhat now I've committed myself to a stupidly ambitious book project...
PP.