Nikon D300 User Manual (en)

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❚❚Commander Mode
Use the built-in flash as a master flash controlling one or more 
remote optional SB-900, SB-800, SB-600, or SB-R200 flash units in 
up to two groups (A and B) using advanced wireless lighting.
Selecting this option displays the menu 
shown at right. Press 
4 or 2 to highlight the 
following options, 
1 or 3 to change.
Option
Description
Built-in 
flash
Choose a flash mode for the built-in flash (commander flash).
TTL
i-TTL mode. Choose flash compensation from values between 
+3.0 and –3.0 EV in increments of 
1
/
3
EV.
M
Choose the flash level from values between [Full] and [1/128] 
(
1
/
128
 of full power).
– –
The built-in flash does not fire, but the AF-assist illuminator 
lights. The built-in flash must be raised so that it can emit 
monitor pre-flashes.
Group A Choose a flash mode for all flash units in group A.
TTL
i-TTL mode. Choose flash compensation from values between 
+3.0 and –3.0 EV in increments of 
1
/
3
EV.
AA
Auto aperture (available only with SB-900 and SB-800 flash 
units). Choose flash compensation from values between +3.0 
and –3.0 EV in increments of 
1
/
3
EV.
M
Choose the flash level from values between [Full] and [1/128] 
(
1
/
128
 of full power).
– –
The flash units in this group do not fire.
Group B
Choose a flash mode for all flash units in group B. The options 
available are the same as those listed for [Group A], above.
Channel
Choose from channels 1–4. All flash units in both groups must 
be set to the same channel.