Av:ChangingtheDepthofField
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When using an aperture with ahigh f/number, note that camera
shake can occur in low light scenes.
A higher aperture f/number will make the shutter speed slower.
Under low light, the shutter speed can be as long as 30 sec. In such
cases, increase the ISO speed and hold the camera steady oruse a
tripod.
The depth of field depends not only on the aperture, but also on
the lens and on the subject distance.
Since wide-angle lenses have a wide depth offield (range of
acceptable focus in front ofand behind the point offocus), you need
not seta high aperture f/number to obtain asharp picture from the
foreground tothe background. On the other hand, a telephoto lens
has a narrow depth of field.
And the closer the subject, the narrower the depth of field. A farther
subject will have awider depth of field.
Set the aperture so that the shutter speed display does not
blink.
Ifyou press the shutter button halfway and change
the aperture while the shutter speed is displayed,
the shutter speed display will also change to
maintain the same exposure (amount of light
reaching the image sensor). If you exceed the
adjustable shutter speed range, the shutter speed
display will blink to indicate that the standard
exposure cannot be obtained.
Ifthe picture will be too dark, the "30"" (30 sec.) shutter speed
display will blink. Ifthis happens, turn the < _ >dial to the left to set
a lower aperture f/number or increase the ISO speed.
Ifthe picture will be too bright, the "4000" (1/4000 sec.) shutter
speed display will blink. If this happens, turn the <_ > dial to the
right to set a higher aperture f/number or decrease the ISO speed.
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