High-Speed Sync; Second-Curtain Sync - Canon SPEEDLITE 430EX Instruction Manual

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High-Speed Sync
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With high-speed sync, you can use flash with all shutter speeds. This is
convenient when you want to use aperture priority for fill-flash portraits.
ETTL
Zoom
SDmm
Press the
<~H/~>
button so that
<
O!I
> is displayed.
I .
Check that the <
~H
> icon is lit in the
viewfinder.
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If you set a shutter speed that is the same or slower than the camera's
maximum flash sync speed, <
~H
>
wil not be displayed in the viewfinder.
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With high-speed sync, the faster the shutter speed, the shorter the
effective flash range will be. Check the LCD panel for the maximum flash
range for the respective shutter speed.
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To return to normal flash, press the
<~H/~>
button so that <DB> icon
turns off.
With a slow shutter speed, you can create a light trail following the
subject. The flash fires right before the shutter closes.
ETTL Zoom
SDmm
Press the
<~H/~>
button so that
<~>
is displayed.
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Setting the shooting mode to
"bulb"
will make it easier for second-
curtain sync.
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To return to normal flash, press the
<~H/~>
button so that the
<~>
icon turns off.
• With E-TTL II/E-TTL, the flash will fire twice even with a slow sync speed.
The first flash is the preflash.
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