Nikon D300s Flash Control at 1/320 s Auto FP, E2 Flash Shutter Speed, 282, Flash-Ready Indicator

Flash Control at 1/320 s (Auto FP)

When 1/320 s (Auto FP) is selected for Custom Setting e1 (Flash sync speed, 0 281), 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).

Flash sync speed	1/320 s (Auto FP)		1/250 s (Auto FP)		1/250 s
	Built-in	Optional	Built-in	Optional	Built-in	Optional
Shutter speed	flash	flash unit	flash	flash unit	flash	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

*Flash range drops 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 1/320 s (Auto FP) is selected.

e2: Flash Shutter Speed

Gbutton ➜ ACustom Settings menu

This option determines the slowest shutter speed available when using front- or rear- curtain sync or red-eye reduction in programmed auto or aperture-priority auto exposure modes (regardless of the setting chosen, shutter speeds can be as slow as 30 s

in shutter-priority auto and manual exposure modes or at flash

settings of slow sync, slow rear-curtain sync, or red-eye reduction with slow sync). Options range from 1/60 s (1/60 s) to 30 s (30 s).

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