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To activate high-speed sync mode on the VS-570C,
press the Mode button repeatedly to cycle through
the flash modes until the high-speed sync mode
indicator appears on the LCD.
To turn high-speed sync on or off, press the up
or down buttons. "On" will appear in the top right
corner of the LCD when high-speed sync mode is
activated, and "--" will appear when high-speed
sync mode is deactivated.
Locking Flash Exposure
In automatic TTL mode, you can lock the flash output level that is optimal for specific elements of your scene
by using the flash exposure lock (FEL) on your camera. To lock flash exposure, follow these steps:
1.
Position the element of your scene that you want to be correctly exposed in the center of your viewfinder.
2.
Press the FEL button on your camera. The flash will fire a test shot and lock its output level.
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Locking Flash Exposure
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