1. Not enough qualifying shots
Note that the AFA values are all 0. This is probably caused by one of a few things:
- Not using Camera JPEGs (direct from the camera)
- Using Back button for AF lock (see below)
- AF Adjustment turned off or set to disabled
Related Articles:
Why can't I use the rear (back) AF-ON button?
Camera Settings Checklist - FocusTune V3/V4