Canon POWERSHOT SD630 DIGITAL ELPH User Manual page 52

Metering Methods
[]
Evaluative
Center
[] Weighted
Average
[] Spot
Appropdate far standard shooting conditions,
including backlit scenes. The camera divides images
into several zones far metedng. It evaluates complex
lighting conditions, such as the position of the subject,
the brightness, the direct light, and the backlighting,
and adjusts the settings to the correct exposure far the
main subject.
Averages the light metered from the entire frame, but
gives greater weight to the subject matter at the
center.
Meters the area within the spot AE point at the center
of the LCD monitor. Use this setting when you want to
set the exposure on the subject in the center of the
monitor.
50