Changing The Flash Timing; Reducing Red-Eye - Canon PowerShot G7 X Mark III Advanced User's Manual

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Changing the Flash Timing

The timing of flash firing relative to shutter release is adjustable.
1st curtain
1st curtain
2nd curtain
[1st curtain] is used whenever the shutter speed is 1/100 or faster, even if
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you select [2nd curtain].
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Reducing Red-Eye

To help prevent red-eye, the camera can illuminate the red-eye reduction
lamp before firing the flash in low-light shots.
1
[Shutter sync.]
The flash fires immediately after the shutter opens.
The flash fires immediately before the shutter closes.
1
[Red-eye lamp]
2nd curtain
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