Canon EOS D30 - Manual (Page 76)

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Aperture-Priority AE
In this mode, you set the aperture value, and the camera automatically sets the shutter speed
to suit the brightness of the scene. This is called Aperture-Priority AE.
By setting a smaller aperture value (larger aperture), you can blur the background to make the
subject stand out as in a portrait. Or, by setting a larger aperture value (smaller aperture), you
can increase the depth of field to make both the foreground and background look sharp.
* stands for “aperture value.”
1 Set the Mode Dial to
〈 〉
.
2 Select the aperture value.
● Turn the
〈 〉
dial.
3 Focus on the subject.
● Press the shutter button down halfway.
The shutter speed is determined automatically.
4 Check the display, then take the
picture.
● If the shutter speed is not blinking, the
exposure is correct.
● Compose the picture, then press the
shutter button down fully.
Small aperture value Large aperture value