Sigma sd Quattro, Руководство пользователя

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A APERTURE PRIORITY AE
After you set the aperture, the camera will determine the appropriate
shutter speed. If you select smaller apertures, depth of field will be greater.
Larger apertures tend to blur the background, as depth of field will be
shallower.
1
Set the Exposure Mode to the A position.
(In the Viewfinder, the aperture value
indicator is illuminated in green.)
2
Set the desired aperture value by rotating
the Front Dial.
3
Press the shutter button “half-way” to
verify the focus and take the picture.
WARNING !!

When is shown on the color LCD monitor, camera shake may
occur (a slow shutter speed is set). If this mark is displayed, please use
the flash (P.99) or a tripod.

If the appropriate shutter speed is outside the range of suitable
combinations due to the subject being too bright or too dark, the shutter
speed indicator will blink. If the subject is too bright, set the aperture
value to a smaller one (larger F-number). If the subject is too dark, set
the aperture value to a larger one (smaller F-number) until the indicator
stops blinking.