What Is Metering and How Is It Used in Cameras?

When talking about cameras and taking photographs ‘metering’ describes the process a camera uses to automatically determine the correct exposure settings for a capturing a photograph. Incoming light is read or ‘metered’ by the camera’s onboard software and exposure settings are calculated based on the read values. A camera can usually be set to one of three of metering methods; Matrix Metering, Spot metering and Center-weighted metering. Each will produce a different exposure so selecting the appropriate metering method for a given scene is extremely important when considering how you want a photograph to be captured.