How Center-weighted Metering works in DSLR Cameras

Center-weighted metering concentrates the measurement of light on the central area of the image area. This allows you to get a more accurate reading for a critical portion of the scene and works well when there is a fairly even range of light values in the scene.

A derivative of center-weighted metering is center-weighted evaluative metering, where the entire image area is considered when determining exposure, but more emphasis is placed on the central area of the image.