Switching Between Metering Modes; Metering Methods - Canon PowerShot SD850 IS Digital ELPH User Manual

Metering Methods
Appropriate for standard shooting conditions,
including backlit scenes. The camera divides
images into several zones for metering. It evaluates
[] Evaluative 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 for the main subject.
Center Averages the light metered from the entire frame,
[] Weighted but gives greater weight to the subject matter at the
Average center.
Meters the area within the spot AE point at the
[] Spot center of the LCD monitor. Use this setting when
you want to set the exposure on the subject in the
center of the monitor.
The metering method is fixed to [Evaluative] in the Long
Shutter mode (p. 57).
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