FWIW, the fastest and easiest way I've figured out to set AFMA is just set up on tripod, set aperture wide open then take a picture of a window screen at about a 45 degrees horizontal off perpendicular. Zoom the shot on the camera LCD all the way and verify where the vertical "focused strip" of screen is in relation to zooming the center of the shot. Adjust AFMA to get the "focused strip" in the center. I'll itterate between focusing from further out and focusing from closer in and then "average" the results to settle on the AFMA setting used. I have found this to be very accurate and quick...the texture and color of the screen really shows the focus zone prominently and the faster the lens the better it shows. LOL, maybe I'll get torched for offering such an unscientific and gadget free approach, but the shots afterwards pass the pixel peeping tests.