Sony DSLR-A900 User Manual
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53
Shooting with Aperture priority
If you set the aperture (a smaller F-
number) wider, the in-focus range
becomes narrower. Only the main subject
is then in focus. When the aperture is
smaller (a larger F-number), the in-focus
range becomes wider. The whole image
is sharpened. The shutter speed is
automatically adjusted.
number) wider, the in-focus range
becomes narrower. Only the main subject
is then in focus. When the aperture is
smaller (a larger F-number), the in-focus
range becomes wider. The whole image
is sharpened. The shutter speed is
automatically adjusted.
Wide aperture
Small aperture
1
Set the mode dial to A.
2
Select the aperture value (F-
number) with the front or rear
control dial.
number) with the front or rear
control dial.
• You can check the blurring of an image
with the preview button (page 89).
• When the camera judges that the proper
exposure is not obtained with the
selected aperture value, the shutter
speed flashes. In such cases, adjust the
aperture again.
selected aperture value, the shutter
speed flashes. In such cases, adjust the
aperture again.
• The aperture value is adjusted in 1/3
EV increments. You can set this
exposure step to 1/2 EV increments
with [Exposure step] in the
exposure step to 1/2 EV increments
with [Exposure step] in the
Recording menu (page 111).
Aperture (F-number)