Nikon SB-30 Manuel D'utilisation page 23

Two methods of wireless slave flash shooting
Wireless slave flash can be performed in two ways by setting the Mode
selector dial:
(1) Auto wireless slave flash (A) mode:
• The SB-30 starts and stops firing in sync with the master Speedlight.
• The maximum shooting distance of the SB-30's light sensor is approx. 5m (16 ft.).
(2) Manual wireless slave flash (M) mode:
• The SB-30 only fires at M1/1 output in sync with the master Speedlight.
• The maximum shooting distance of the SB-30's light sensor is approx. 40m (131 ft.).
Notes
• Position the slave flash unit (SB-30) so that light from the master flash unit can reach the light sensor of the
slave flash unit. This is particularly important when taking pictures while holding a slave flash unit in your hand.
• The correct exposure cannot be obtained if the master Speedlight fires a series of preflashes (Monitor Preflash).
Cancel the Monitor Preflash of the master flash unit using the methods described below. This is necessary
except for the one preliminary flash firing of the COOLPIX that does not affect the correct exposure.
F80-Series/N80-Series,
F70-Series/N70
F5, F100, F90X/N90s,
F90-Series/N90
D1-Series
Set the camera's exposure mode to Manual (M)
Cancel the Monitor Preflash of the Speedlight mounted on the camera.
Set the flash mode of the Speedlight mounted on the camera to Non-TTL auto
or Manual flash.
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