Canon A80 - Manual (Page 114)

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4
Press the button.
5
Shoot the image.
ISO speed
The ISO speed is the numeric representation of the
camera’s sensitivity to light. The higher the ISO speed, the
higher the sensitivity. A high ISO speed allows you to shoot
images in dark indoor or outdoor conditions without a flash
and also helps prevent blurred images due to camera shake.
This is convenient when shooting images in places where
flash photography is prohibited. The ISO speed setting
makes full use of the available light, resulting in images that
convey the feel of the place they were shot.
• Higher ISO speeds increase the image noise. To take
clean images, use as low an ISO speed as possible.
• The AUTO setting selects the optimal speed. It will
automatically raise the speed when the light from the
flash is insufficient to illuminate the subject matter.
ISO 50 equivalent ISO 400 equivalent