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6. Flash synchronisation
Different modes of flash synchronisation are pos-
sible, depending on the camera model. Please
refer to the camera’s operating instructions to find
out how the individual modes of synchronisation
are set on the camera.
6.1 Normal synchronisation
This mode is available with all TTL cameras, and it
is suitable for most flash shots. With normal
synchronisation, switching to the camera’s flash
sync shutter speed is automatic. The shutter speed
may vary from 1/30th and 1/250th seconds,
depending on the camera model. Please refer to
the camera’s operating instructions for further
details.
6.2 Second curtain synchronisation (REAR)
Some cameras offer the facility of second shutter
curtain synchronisation.
First curtain Second curtain
With normal synchronisation, the flash is fired pre-
cisely after the opening of the first shutter curtain.
When using slow shutter speeds, and with moving
objects, this would result in an unnatural rendition
of light traces. With second curtain or rear curtain
synchronisation, the flash is fired as the exposure
is ending, just before the second curtain covers
the film again. This makes the light trail behind the
moving objects instead of appearing in front of
them, and renders a more natural looking picture.