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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