Here's my unsophisticated set-up:
Here is the first picture that I took with an f stop of 2.0. (I enlarged the picture for your viewing pleasure.) I was focused directly on the 5.
As you can see, the focus fell on the 6 and into the 7.
Here's the same shot (f stop was 2.2) with the auto focus adjusted by -10.
Here's Tiger with the focal point on his right eye.
I think I need to find a replacement because my warm, fuzzy feeling with this lens is gone. Does anyone have a Sigma 30mm f/1.8? Bueller? Bueller?