Cheers Enda - I have to say that's pretty spectacular given those sort of movements on that wide of a lens.
I noticed the Cambo version has a helical similar to the 24 - I guess there's very little back/front movement of the lens between its closest focussing distance and infinity?
That said, do you even try to focus this, or is it so wide that it's just f11 @ infinity most of the time?