Nikon D300 - Manual (Page 315)

289
U
Flash Control at [1/320 s (Auto FP)]
When [1/320 s (Auto FP)] is selected for Custom Setting e1 ([Flash
sync speed], pg. 288), the built-in flash can be used at shutter
speeds as fast as
1 /
320
s, while optional SB-900, SB-800, SB-600, and
SB-R200 flash units can be used at any shutter speed (Auto FP
High-Speed Sync).
D
[1/320 s (Auto FP)] and Flash Range
When [1/320 s (Auto FP)] is selected for Custom Setting e1 at shutter
speeds between
1 /
250
s and 1 /
320
s , flash range will drop as shutter speed
increases. Flash range will nevertheless be greater than that obtained at
the same speeds with Auto FP.
D
The Flash-Ready Indicator
When the flash fires at full power, the flash-indicator in the camera
viewfinder will blink to warn that the resulting photograph may be
underexposed. Note that the flash-ready indicators on optional flash
units will not display this warning when [1/320 s (Auto FP)] is selected.
Flash sync speed [1/320 s (Auto FP)] [1/250 s (Auto FP)] 1/250 s
Shutter speed
Built-in
flash
Optional
flash unit
Built-in
flash
Optional
flash unit
Built-in
flash
Optional
flash unit
1 /
8,000
– 1 /
320
s — Auto FP — Auto FP — —
1 /
320
– 1 /
250
s Flash sync — Auto FP — —
1 /
250
–30 s Flash sync