Sigma 1A900 fp Mirrorless Camera with 45mm Lens

User Manual - Page 106

For 1A900.

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106
The flash tuning speed is set to 1/30 sec. or less (1/15 sec. or less when
the image quality is set to DNG and DNG + JPEG and the memory bit
count is 14 bits). When shooting with the flash using manual exposure,
set the shutter speed to 1/30 sec. or less (1/15 sec. or less).
FLASH MODE SETTING
Some items of the external flash can be set from the camera side.
To set the flash mode, select [
SHOOT] [Flash].
RED-EYE REDUCTION FLASH (Red-eye)
When taking a picture with a flash, sometimes the person’s eyes reflects the
flash light and the "red-eye" phenomenon will appear in the picture. In order
to avoid this effect, the light flashes for about one second before the picture
is taken to reduce the effect of red-eye.
Depending on the lighting and subject conditions, the Red-eye Reduction
flash may not completely eliminate the red-eye in all cases.
REAR CURTAIN SYNCHRONIZATION (Rear Curtain Sync.)
When you use rear curtain synchronization, the flash will fire just before the
rear curtain begins to close and the subject will be exposed to ambient light
from the time the shutter opens until the flash fires. As a result traces of the
subject will be recorded behind the subject. This gives a more natural
effect.
SLOW SYNCHRO MODE (Slow Sync.)
When using the flash with P/A mode, the shutter speed value, which will
reduce camera shake, is set automatically. The slow synchro mode
changes the shutter speed by up to 30 seconds depending on the lighting
conditions. This mode is suitable for shooting portraits and nightscapes.
AF ASSIST LIGHT (AF Assist Light)
When the AF Assist Light prevents appropriate shooting, disable it by
setting [AF Assist Light] to [Off].
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