Setting The Aperture - Canon PowerShot G7 User Guide Advanced User Manual

Setting the Aperture

Shooting Mode
The aperture adjusts the amount of light entering through the lens.
When you set the aperture value, 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. 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.
When using the control dial, the
aperture value can be changed.
If the shutter speed is shown in red, the image is
underexposed (insufficient light) or overexposed (too much
light). Adjust the aperture value using the control dial until
the shutter speed display turns to white.
Some aperture values may not be available with certain
zoom positions (p. 49).
In this mode, the shutter speed range with synchronized flash
is 1/60 second to 1/500 second. The aperture value setting
may therefore be changed automatically to match the
synchronized flash speed even if its value was set previously.
Aperture Value Display
The larger the aperture value, the smaller the lens aperture.
F2.8 F3.2 F3.5 F4.0 F4.5 F4.8 F5.0 F5.6 F6.3 F7.1 F8.0
You can change the automatically selected combinations of
shutter speeds and aperture values without altering the
exposure (p. 69).
50
bar will be displayed and the