So, I've taken a few pictures with the new camera, and it may be me or it may be the camera, but some shots didn't seem to focus well, So, I've been all over the forums, reading about folks' AF experiences with the D7000. I've reviewed about 5 general categories of AF evaluation, downloaded all sorts of pdf target images, and done some ad-hoc testing of my camera that would indicate my D7000/18-200mm has a slight backfocus difference in the lower focal lengths.
I'm going to do a slight adjustment based on that to do Christmas shooting, but I'm going to do a more rigorous test after the holiday. In doing so, I'm wondering if the difference between the distances reported in the EXIF FocusDistance parameter for a LiveView-focused image vs. a AF-focused image would be useful for quantifying the correction needed? Here's one example from my ad-hoc testing, at 18mm, data extracted with exiftool from the NEF:
LiveView: 0.67 m AF: 0.79 m
Diff: about +4.7 inches.
I shoot the LiveView image first, then turn off LV and shoot with AF; in doing so, I see the focus ring shift when I half-press the shutter release to take the AF picture.
I've searched for anyone doing something similar, but all I find is about how FocusDistance is an inaccurate measurement of actual distance. For this purpose, however, I'd think that the difference between the two measurements (LV, AF) would be appropriate to use for AF fine-tuning, given that the two focus mechanisms are acting on the same device. I'm also thinking of developing a table of difference measurements for each fine-tuning step; I can't find anyone who's done that, which probably means it's a dumb idea for some reason (non-linearity, differences in camera-lens magnitudes, etc)...
I know that AF fine tune and the "D7000 problem" have been beaten to death, but I can't find any prior discussion along these lines. Comments and criticism are welcome here...