Nikon SB-80DX - Manual (Page 50)

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8 Set the shutter speed.
nUse the equation to determine the shutter speed and
set that shutter speed or one slower.
Shutter speed = Number of flashes per frame ÷
Frequency of flashes (Hz)
nFor example, if the number of flashes per frame is 10
and frequency is 5 Hz, divide 10 by 5 to get a shutter
speed of 2 sec. or slower.
nOr you can set the shutter speed to
B (bulb) to
accommodate any number of repeating flashes.
Manual G mode
7 Set the same aperture on the camera or lens that
is set on the SB-80DX.
nFor cameras in Groups I and II, and Digital SLRs
cameras with CPU lenses, set the SB-80DX’s
aperture on the camera (p. 4).
9 Confirm that the ready-light is on, then
shoot.
Making sure the flash fires correctly before shooting
m Press the h button to make sure the flash fires correctly as set.
6 Determine the guide number according to the
flash output level and zoom-head position set,
then calculate the correct aperture from the
guide number and the shooting distance. Finally
set this aperture on the SB-80DX.
nRefer to “Guide number table” (p. 45) and
“Determining the aperture and flash output level in
the Manual mode” (p. 44).
nIf the ISO sensitivity is set correctly, the flash shooting
distance appears on the LCD panel to match to the
flash output level and aperture as set.