Is the D7000 overexposure in bright light / probematic AF still an issue? -

Sante Patate wrote:

Sure, changing the mirror angle affects AF. As you and I have pointed out before, the D7000 AF system has a tendency to be distracted by fine detail visible to the periphery of the active AF sensor.

As you and I have also pointed out before, the little black boxes in the viewfinder are substantially smaller than the area the AF sensors see. That combination of things creates what, superficially, looks like back-focusing. In fact, the system is focusing perfectly accurately, just on something different from what the user intended. Obviously, if the little black boxes are mis-aligned relative to the scene elements the AF sensors see, the "back-focusing" will be worse.

The little black boxes are drawn on the viewfinder screen. If you push the front of the mirror upwards, scene elements are projected further back on the viewfinder screen, if you push the mirror downwards scene elements are projected further forward. If you go back to the original demonstration of the adjustment procedure that is exactly - and only - what is shown.

Adjusting the mirror angle re-aligns the little back boxes and the AF sensors and if that was the problem the "back-focusing" gets better. But that does not change the accuracy of the AF, and if folk think it has, IMV their observations are wrong.