I've noticed that, with the Z7 and my SB-300 flash, it is always set to Balanced-Fill flash mode. There seem to be three settings I can change, but all in different spots.
Flash Control Mode (Menu -> Photo -> Flash Control): only gives me TTL or Manual (and all other settings on that page are greyed out. I leave this on TTL to get this behavior.
Flash Mode (Menu -> Photo -> Flash Mode): Only have "Fill-flash," "Red-rye reduction," "Rear curtain sync," and "Flash off." I set this to either Fill or Rear; either way, this issue occurs.
Flash compensation: not particularly relevant to this test.
When I cycle through the displays to get to the flash interface (for the unified flash control), it shows TTL BL. Nowhere in this screen nor its info menu can I see anything about BL.
The Z6/Z7 manual says that the SB-300 is supported with the Z7 in the following modes:
"i-TTL balanced fill flash"
"Standard i-TTL fill flash"
However, I cannot find a single setting anywhere on the camera that even contains the phrase "Balanced Fill" or its acronym "BL," let alone a setting where I can turn this off.
How do I turn this off? How do I make it stop using the Balanced-Fill mode and go back to the standard mode?