Nikon SB-910 - Manual (Page 66)

D–5
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Wireless Multiple Flash-unit Photography
SB-910 Wireless Multiple Flash-unit Functions
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Notes on canceling the master fl ash unit fl ash function
When the master fl ash unit fl ash function is canceled and only the remote fl ash
units fi re, the master fl ash unit emits a number of weak light signals to trigger the
remote fl ash units. This operation will normally not affect the correct exposure of
the subject, although the exposure might be affected if the subject is close and a
high ISO sensitivity has been set. To limit this effect, bounce the light by tilting up
the master fl ash unit’s fl ash head.