Second-curtain synchronization – Canon 540EZ User Manual
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6. Second-Curtain Synchronization
When the 540EZ is used with an EOS camera, you can select whether to
have the flash fire as soon as fhe shutter opens (first-curtain sync) or
immediately before the shutter closes (second-curtain sync).
When using a slow shutter speed with a moving subject, second-curtain
synchronization will provide a more natural effect because the flash expo
sure occurs at the end of the subject movement rather than at the begin
ning, providing a “trailing blur’’ effect that emphasizes motion.
Second-curtain sync
First-curtain sync
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Second-curtain sync flash photography is not available in Full Auto (C) or
Programmed Image Control (PIC) modes.
Second-curtain sync cannot be combined with stroboscopic flash operation.
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Setting the camera's shooting mode to bulb makes it easier to produce effective
second-curtain sync flash shots