So I have a D7000. Grey market, which I didn't find out until after I had to send it in to get serviced. And it's never felt as...sharp as it should be. I always assumed it was just me. I am going on a trip soon and wanted a really nice mid range zoom lens. I picked up the very well reviewed Sigma 24-105mm F4. Went walking around town a bit, none of the pictures were in focus.
Finally fed up, I grabbed a Spyder test chart, did a few handheld shots and it seemed pretty obvious, to me at least, that my body was front-focusing pretty severely. Decided to get a little bit more scientific, set up my tripod and took a series of test shots. ALL of these are with the body set to +20, the max, in the AF Fine Tune. This album is the result. No post-processing beyond cropping. Thoughts?
I am also getting some weird color issues on my two primes, which I did not notice until just now, no idea what that's about.
EDIT: For a more 'real world' type of testing, I just walked around a bit and took some handheld shots of some things around the house. No cropping and I am set to single point auto focus, so the center of the image should be what's in focus. This is still with a +20 AF compensation dialed in for every lens.