Switching The Timing At Which The Flash Fires - Canon POWERSHOT G9 User Manual

Advanced Shooting Functions
1151
B Switching the Timing at which the Flash Fires []
[] See Functions Available in Each Shooting Mode (p. 270).
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The flash fires right after the shutter opens, regardless of the
1st-curtain shutter speed. Usually, the 1st-curtain is used when
shooting.
The flash fires right before the shutter closes. Compared with
the 1st-curtain, the flash fires later and allows you to shoot
2nd-curtain images in which, for example, a car's taillights seem to trail
off beh nd.