Canon PowerShot Pro 90 IS User Guide

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Shooting - Selecting Particular Effects   
63
Aperture Setting Display
The larger the aperture value, the smaller the lens aperture.
F2.8      F3.2      F3.5      F4.0      F4.5      F5.0      F5.6     F6.3      F7.1      F8.0
The display of aperture settings differs between the display panel and LCD monitor
or viewfinder.
F8.0
F8.0
.   .   .
.   .   .
.   .   .
F2.8
F2.8
Aperture Value
Display Panel
LCD Monitor/Viewfinder