Nikon D4s User Manual page 221

❚❚ Other Flash Units
The following flash units can be used in non-TTL auto and manual
modes.
Flash unit
Flash mode
A Non-TTL auto
M Manual
G Repeating flash
REAR Rear-curtain sync
1 Flash mode is automatically set to TTL and shutter-release is disabled. Set
flash unit to A (non-TTL auto flash).
2 Autofocus is available with AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED and
AF-S Micro NIKKOR 60mm f/2.8G ED lenses only.
3 Available when camera is used to select flash mode.
D
Notes on Optional Flash Units
Refer to the flash unit manual for detailed instructions. If the unit
supports CLS, refer to the section on CLS-compatible digital SLR
cameras. The D4S is not included in the "digital SLR" category in the
SB-80DX, SB-28DX, and SB-50DX manuals.
i-TTL flash control can be used at ISO sensitivities between 100 and
12800. At values over 12800, the desired results may not be achieved at
some ranges or aperture settings. If the flash-ready indicator flashes for
about three seconds after a photograph is taken in i-TTL or non-TTL
auto mode, the flash has fired at full power and the photograph may be
underexposed.
When an SC-series 17, 28, or 29 sync cable is used for off-camera flash
photography, correct exposure may not be achieved in i-TTL mode. We
recommend that you select standard i-TTL flash control. Take a test shot
and view the results in the monitor.
In i-TTL, use the flash panel or bounce adapter provided with the flash
unit. Do not use other panels such as diffusion panels, as this may
produce incorrect exposure.
SB-80DX,
SB-28DX,
SB-28, SB-26,
SB-25, SB-24
✔
✔
✔
✔
3
SB-30, SB-27
SB-22S, SB-22,
SB-20, SB-16B,
SB-50DX SB-15
✔
—
✔ ✔
— —
✔ ✔
1
,
2
SB-23, SB-29 ,
2
SB-21B ,
2
SB-29S
—
✔
—
✔
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