Fv Lock - Nikon Z 7 Reference Manual

FV Lock

This feature is used to lock flash output, allowing photographs to
be recomposed without changing the flash level and ensuring
that flash output is appropriate to the subject even when the
subject is not positioned in the center of the frame. Flash output
is adjusted automatically for any changes in ISO sensitivity and
aperture. FV lock is not available in b mode.
To use FV lock:
1
Assign FV lock to a camera control.
Assign FV lock to a control using
Custom Setting f2 (Custom control
assignment).
2
Attach a CLS-compatible flash unit.
Mount a CLS-compatible flash unit on the camera accessory
shoe.
3
Set the flash unit to the appropriate mode.
Turn the flash unit on and select TTL or Auto external flash
for Flash control > Flash control mode (SB-5000, SB-500,
SB-400, or SB-300) or set the flash control mode to TTL,
monitor pre-flash qA, or monitor pre-flash A (other flash
units; see the documentation provided with the flash unit for
details).
On-Camera Flash Photography
355