FujiFilm 1300 - Manual (Page 45)

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( ) Night portrait (slow sync) mode
Used when taking portraits to record the background in a night scene.
Your camera will be placed in the slow shutter speed/red-eye reduction mode
(The flash fires briefly 10 times (pre-flash), then fires the 11th time for taking a
picture.), allowing you to take both the night scene and your subject clearly.
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This mode is automatically cancelled after the exposure has been made.
As a slow shutter speed is used with the night portrait mode, use a tripod or other solid
support to prevent camera shake resulting in unsharp pictures. It is also important that the
subject remain motionless during the exposure.