Canon PC1057, Руководство пользователя

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Setting the Aperture
When you set the aperture in the aperture-priority AE mode, the
camera automatically selects a shutter speed to match the
brightness.
Selecting a lower aperture value (opening the aperture) allows you
to blur the background and create a beautiful portrait. A higher
aperture value (closing it) brings the entire range from foreground to
background into focus. The larger the aperture value, the greater the
range of the image brought into clear focus.
1
Turn the mode dial to Av.
z The aperture value will show on the display panel
and LCD monitor (or in the viewfinder).
2
Turn the main dial and select an
aperture value.
z If you adjust the zoom after you set the
aperture value, the aperture value is
sometimes changed according to the
zoom position.
3
Shoot the image.
z The correct exposure has been set if the
shutter speed and aperture value show in
white on the LCD monitor (or in the
viewfinder).
z If the shutter speed is shown in red on the
LCD monitor (or in the viewfinder), the
image is underexposed (insufficient light)
or overexposed (too much light). Adjust the aperture value using the
main dial until the shutter speed display turns to white.
If you set [Safety Shift] to [On] in the Rec. menu, the aperture value
will shift to the correct value automatically (Safety Shift function
(p. 86)).
z You can change the automatically selected combinations of
shutter speeds and aperture values without altering the exposure
(p. 105).