❚❚Auto FP High-Speed Sync

When 1/320 s (Auto FP) or 1/250 s (Auto FP) is selected for Custom Setting e1 (Flash sync speed, 0 329), the built-in flash

can be used at shutter speeds as fast as 1/320 s or 1/250 s, while compatible optional flash units (0 430) 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

From 1/8000 to but not

Auto FP

Auto FP

including 1/320 s

 

 

 

 

 

 

From 1/320 to but not

Flash sync*

Auto FP

including 1/250 s

 

 

 

 

 

 

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 flash 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.

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