[JJ_SO]

Dave, it would be very interesting, if and how the complainers adjusted their Sigmas, and if and how there are differences between the different mount systems. As long as there are some unqualified complaints, all I can say is, my Sigmas work well and reliable to the degree of Nikkor reliabiity - but all of them are less precise than thesame shot with mirrorless.

 

I still suspect Nikon to have a random function in their firmware and volkswagen third party lenses. It would not be totally impossible.  :ph34r: [/conspiracy_mode]