Olympus iS-20 IS-20 DLX Instruction Manual (2 MB) - Page 52

Center-Weighted Average Light, Metering, Spot Metering

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Center-Weighted Average Light Metering Center-weighted average light metering is the most widely used light metering system (Fig. A). This system measures the light available throughout the frame with special emphasis on the center of the frame. When in the Aperture-Preferred Auto mode, this light metering system is automatically activated. When the contrast between bright and dark areas is not too extreme outside the center of the frame, this system offers excellent results. Spot Metering Spot metering (Fig. B) measures the brightness at the center of the frame only. Because this metering system calculates the correct exposure for only one point, it is convenient when the subject is backlit or the picture contains strong contrasts. When shooting a subject in front of an extremely bright background, you should use spotmetering on the subject's face. 52

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Center-Weighted Average Light
Metering
Center-weighted average light metering is
the most widely used light metering system
(Fig. A). This system measures the light
available throughout the frame with special
emphasis on the center of the frame. When
in the Aperture-Preferred Auto mode, this light
metering system is automatically activated.
When the contrast between bright and dark
areas is not too extreme outside the center of
the frame, this system offers excellent
results.
Spot Metering
Spot metering (Fig. B) measures the
brightness at the center of the frame only.
Because this metering system calculates the
correct exposure for only one point, it is
convenient when the subject is backlit or the
picture contains strong contrasts. When
shooting a subject in front of an extremely
bright background, you should use spot-
metering on the subject's face.
52