Quote Originally Posted by E. von Hoegh View Post
No it does not. The entire optical part of the lens moves forward in the helicoid mount.
Whoops, sorry my bad you're completely correct. Not enough coffee yet. What I meant is that ultimately a small shift in the rear shouldn't result in massive offness (subject to lens design of course) but a change in some optical aspect that usually ends up being compensated for by literally focusing the lens.