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The SB-800 can be used with Speedlights compatible with the TTL auto
flash mode to perform multiple flash shooting using cords.
• Use of the SB-50DX and SB-23 as remote flash units is not recommended, because
the standby function cannot be canceled.
• Speedlights SB-11, SB-14, SB-140, and SB-21B cannot be used with the F-401/N4004
or F-401s/N4004s as either master or remote flash units.
• There is no limitation in usable cameras.
• With cameras compatible with CLS and digital SLRs not compatible with CLS, Manual
flash operation only is possible.
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The maximum number of flash units to be connected using cords
• Up to five units including the master flash unit can be used for multiple flash
photography at a total cable length of 10m (33 ft.).
• Make sure the combined total of the coefficients in the table below for all flash units
used together does not exceed 20 at 20°C (68°F) or 13 at 40°C (104°F).
• If it exceeds these figures, you may not be able to take a second shot after the first one.
In this case, turn off the power of all flash units and reduce the total number of flash
units connected.
Speedlight
Coefficient
SB-800, SB-80DX, SB-50DX, SB-30, SB-29, SB-29s, SB-28, SB-28DX,
SB-27, SB-26, SB-25, SB-24, SB-22s, SB-14, SB-11, SB-140
1
SB-23, SB-21, SB-17, SB-16, SB-15
4
SB-22
6
SB-20
9
Multiple flash shooting using cords