Nikon Df User Manual page 151

4
Focus.
Position the subject in the
center of the frame and press
the shutter-release button
halfway to focus.
5
Lock flash level.
After confirming that the flash ready
indicator (M) is displayed in the
viewfinder, press button selected in Step 1. The flash will emit
a monitor preflash to determine the appropriate flash level.
Flash output will be locked at this level and FV lock icon (e)
will appear in the viewfinder.
6
Recompose the photograph.
7
Take the photograph.
Press the shutter-release button the rest of the way down to
shoot. If desired, additional pictures can be taken without
releasing FV lock.
8
Release FV lock.
Press the button selected in Step 1 to release FV lock. Confirm
that the FV lock icon (e) is no longer displayed in the
viewfinder.
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