In image 3, the flash was in TTL and the subject was placed in the left part of the frame and the leftmost focus point selected. You can see that the statue is slightly overexposed from being off-center, but that is not what I am studying this time.
In image 4, next, (still in TTL mode) I moved the focus point to the far right on the rope extending below the hats, and allowed the camera to focus there. You can see that moving the focus point did not affect the flash metering. The subject (although now out of focus) is exactly the same brightness as the previous image, as is the background.
In image 5 I switched to TTL-BL mode and placed the focus point back on the statue. You can see that the statue is no longer overexposed, as the balancing equations try to balance it with the darker background.
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