Normally, the flash fires in synchronization with the first shutter curtain when the shutter is fully open. With second-curtain synchronization, the flash fires immediately before the second shutter closes at the end of the exposure
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Set the shooting mode with the camera
Press the <+> or <-> buttons simultaneously to select  on the LCD panel.
- Each time you press the <+> and <-> buttons simultaneously, the synchronization mode changes in the following loop:
Focus and take the picture
- Check that the flash icon is displayed in the viewfinder before taking the picture
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- To cancel second-curtain synchronization press the <+> and <-> buttons simultaneously to turn off the icon on the LCD panel
- With the Rebel G, TTL autoflash is used with second-curtain synchronization
- Second-curtain synchronization does not work with camera's
(Full Auto) shooting mode and Programmed Image Control modes
