289
U
Flash Control at [1/320s (Auto FP)]

When [1/320s (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 1/320s, 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[1/320s (Auto FP)] and Flash Range
When [1/320s (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.
DThe 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 [1/320s (Auto FP)] is selected.
Flash sync speed [1/320s (Auto FP)] [1/250s (Auto FP)] 1/250s
Shutter speed
Built-in
flash
Optional
flash unit
Built-in
flash
Optional
flash unit
Built-in
flash
Optional
flash unit
1/8,0001/320s Auto FP Auto FP
1/3201/250s Flash sync Auto FP
1/250–30s Flash sync