I'm trying to understand you. What was the initial focus target?
The face/eye is where I activated focus and where it has stayed, even though the initially selected (primary) point had moved to the top of the near shoulder when the shot was actually taken.
It must be my inexperience with the subject because I'm only really seeing detail in the feathers down by his feet. Because of that, I don't think the TC should to blame. If his eye is in focus, shouldn't that hole on his beak be more defined? Again, I've only shot bird with guns
The details are larger/coarser down by the foot. The point is not really the overall sharpness/IQ, and in reality even 1/1600 is pushing it for handholding the 400/2.8 +2x IMO; particularly because I wasn't using the shoulder mount for this image (2x FL is my default minimum w/ long FL's). I'm fighting a lot of "negatives" with this image.
The point is that the initially selected AF point had moved to the near shoulder (lower left edge in this crop) and the focus did not shift to that point with it. Out of two separate bursts of 3 images, focus held for all 6.
