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Using theMetering is weighted at the center of the screen. Use this metering when you want to compensate the exposure by experience, instead of leaving it to the camera.
The illustration shows that sensitivity increases as the pattern height increases (center). This mode does not automatically compensate for backlit scenes.
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Functions Shooting
Rotate the metering mode select lever to set the white index to M.
Using the Spot Metering
With spot metering, brightness is measured only within a limited area at the center of the screen as shown in the illustration. You can use AE lock in combination when the subject is extremely small and proper exposure is difficult to obtain. (p.69)
Spot metering zone
1 Rotate the metering mode select lever to set the white index to 6.