Thom Hogans Nikon Camera,link.

et me reiterate why we’re testing cameras and why we’re testing them one particular way: Nikon programmed some cameras incorrectly. Thus, we want a test that checks for that single problem first and foremost, and that’s what I proposed in my original article on the problem, which I’ve updated with a couple of additional notes. We are looking for a very simple pattern: out of six shots (three live view, three phase detect), one may be very, very different than the rest. If you find that result using my test, your camera is potentially a candidate for having its internal focus sensor table reprogrammed. If you don’t find that result, then your camera likely doesn’t have that problem (it might have another problem, or it might have no problem).