I just started testing my new 14-24 refurb. Seems fine, although the focus shift issues are real. Most of the time this will be focussed in live view on a tripod, at working aperture, so it's not a big deal. But I'd like the option of using the thing hand held with AF.
How have owners of this lens calibrated the AF? Focus shift seems different at different focal lengths. I assume there's no perfect solution, but am all ears for a workable one.