Center weighted metering is a camera metering mode. Center weighted metering places the highest importance in determining a correct exposure on information contained in the center of the frame. For example, if you are shooting a natural light portrait and have placed your subject in the center of the frame, the camera will determine the correct exposure for their face while placing a significantly lesser importance on the background. It will still take the background into consideration, so if it is significantly brighter than the subject in the center it will still cause a darkening in exposure, but to a lesser degree than if using a metering mode that averages the exposure of the entire frame.
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