Matrix metering calculates the exposure based on zones within the viewfinder and takes into account focussing point, distance, and overall lighting levels. This type of metering is most common in ‘point and shoot’ cameras, and is useful for general photos
without large amounts of shadow.
There are many typical scenarios where exposure is incorrect and the photograph that you take is not what you expected it to be. In these scenarios it is often useful to use exposure compensation to correct the image exposure. Increasing or
decreasing the aperture or shutter speed by one or two stops can achieve exposure compensation.
Cases where you might decrease exposure are when shooting a subject in a dark forest or in other areas that lie predominantly in shadow. Cases where you might increase exposure are when you are shooting subjects in bright sunlight. Remember that with a
dark backdrop, cameras have a tendency to overexpose, while with a bright backdrop the tendency is to underexpose.
Next month, we look at the focal length of cameras.