Second Curtain Synchronisation (Rear); Slow Synchronisation (Slow); Preflash Function For Red-Eye Reduction - Metz MECABLITZ 50 AF-1 digital Sony Bedienungsanleitung

11.3 Second curtain synchronisation (REAR)

Some cameras offer the option of second-curtain synchronisation (REAR), in
which the flash unit is not triggered until the end of the exposure time. This is
particularly advantageous when used with lower shutter speeds (slower than
1/30 sec.) and moving subjects that have their own source of light. With
second-curtain synchronisation, a moving light source will trail a light streak
instead of building one up ahead itself, as it does when
the flash is synchronised with the first shutter curtain. In
this way a „more natural" image of the photographic
situation is produced! Depending on its operating
mode, the camera sets shutter speeds slower than its
sync speed.
On some cameras the REAR function is not possible in certain operating modes
(e.g., certain vari- or subject programs, or with red eye reduction). In these
cases, the REAR mode cannot be selected and/or is automatically cancelled or
ignored (see camera's operating instructions).
The REAR mode is set on the camera (see camera's operating instructions).
There is no display for REAR mode in the flash unit.
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11.4 Slow synchronisation (SLOW)

A slow exposure (SLOW) gives added prominence to the image background at
lower ambient light levels. This is achieved by adjusting the shutter speed to the
ambient light. Accordingly, shutter speeds that are slower than the flash sync
speed (e.g., shutter speeds up to 30 sec.) are automatically adjusted by the
camera. Slow synchronisation is activated automatically on some camera
models in connection with certain camera programs (e.g., a night shot pro-
gram, etc.), or it can be set on the camera (see the camera's operating instruc-
tions). No settings are necessary on the flash unit, nor is there any display for
this mode.
Slow synchronisation SLOW is set on the camera (see camera's operating
instructions)! Use a tripod when shooting with slow shutter speeds to
avoid blurred images!

11.5 Preflash function for red-eye reduction

Various cameras offer the possibility to activate a preflash for red-eye reduction.
This function only supports the flash unit integrated in the camera. It does not
support external flash units.