I know there are a few of you who use this great piece of glass. I have had mine for a few years and I just noticed that the lens outer barrel does not line up with the Hyperfocual marks on the lens tube. All works properly but infinity stops about 1/3 of the way before top dead center. Not a problem but now it bothers me. Little things sometimes do. Do all of your lenses register properly?
I can't answer your question, but it would seem to me that this issue should be a more general issue; not just one seen in this particular lens. So one thing to try is to search online for anyone bringing up this question.
This is a lens I have thought about from time to time. Exceptionally sharp and amazing bokeh.
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