I decided to post this in case my experience could help someone else out. I've always thought that due to the way mirrorless cams focus, AF fine-tuning was rendered pretty much irrelevant -- and honestly didn't understand why it even remained a menu option. To be clear, none of my Z lenses and none of my original 3 or 4 F mount lenses needed to have any adjustment on any of the 3 different Z bodies I've owned -- but I was also confirming them in single, fine-point AF mode and not checking them in continuous AF mode, and perhaps therein lies the rub... With the Z72, I have wandered into more and more continuous eye-tracking AF territory and with my 200-500 lens, I discovered it would regularly back-focus -- only slightly, but at 500mm it doesn't take much to render soft instead of crisp, so I needed to fine tune the AF. I guess it makes some sense in that while static AF is easily confirmed by the on-sensor pixel contrast, predictive AF can vary with lens focus speed capability. To be clear, this is the only lens to date I've noticed any issues with and it did not require a large adjustment -- 1 or 2 points depending. Anyway, sharing simply FWIW...
As an aside, in case you haven't been inside that menu yet, I also discovered that for zooms the AF fine tune menu now lets you separately set each end of the zoom range -- and in the case of my 200-500 with the 1.4xiii converter, they did require a 1 point different amount. Nifty!
As an aside, in case you haven't been inside that menu yet, I also discovered that for zooms the AF fine tune menu now lets you separately set each end of the zoom range -- and in the case of my 200-500 with the 1.4xiii converter, they did require a 1 point different amount. Nifty!
