Nikon D90 - Manual (Page 210)

190
L
8
Raise the built-in flash.
Press the M button to raise the built-in flash. Note that even if – – is selected for
Built-in flash>Mode, the built-in flash must be raised so that monitor
preflashes will be emitted.
9
Frame the photograph, focus, and shoot.
After confirming that the camera flash-ready light and the flash-ready lights for
all other flash units are lit, frame the photograph, focus, and shoot. FV lock (pg.
198) can be used if desired.
D Commander Mode
Position the sensor windows on the remote flash units to pick up the monitor preflashes from
the built-in flash (particular care is required when not using a tripod). Be sure that direct light
or strong reflections from the remote flash units do not enter the camera lens (in TTL mode) or
the photocells on the remote flash units (AA mode), as this may interfere with exposure. To
prevent timing flashes emitted by the built-in flash from appearing in photographs taken at
short range, choose low ISO sensitivities or small apertures (large f-numbers) or use an
optional SG-3IR infrared panel for the built-in flash. An SG-3IR is required for best results with
rear-curtain sync, which produces brighter timing flashes. After positioning the remote flash
units, take a test shot and view the results in the camera monitor.
Although there is no limit on the number of remote flash units that may be used, the practical
maximum is three. With more than this number, the light emitted by the remote flash units will
interfere with performance.
A The Flash Mode Display
M does not appear in the control panel flash mode display when – – is selected for Built-in
flash > Mode.
A Flash Compensation
The flash compensation value selected with the Y (M) button and sub-command dial is added
to the flash compensation values selected for the built-in flash, group A, and group B in the
Commander mode menu. A
Y icon is displayed in the control panel and viewfinder when a
flash compensation value other than ±0 is selected for Built-in flash > TTL. The Y icon
flashes when M is selected for Built-in flash.