Nikon D500 用户手册

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页码 428
205
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 available with CLS compatible flash units 
only (
To use FV lock:
1
Assign FV lock to a camera control.
Assign FV lock to a control using 
Custom Setting f1 (Custom control 
assignment
2
Attach a CLS-compatible flash unit.
Mount a CLS-compatible flash unit (
accessory shoe.
3
Set the flash unit to the appropriate mode.
Turn the flash unit on and set the flash mode to TTL, monitor 
pre-flash 
qA, or monitor pre-flash A. See the documentation 
provided with the flash unit for details.
4
Focus.
Position the subject in the 
center of the frame and 
press the shutter-release 
button halfway to focus.
FV Lock