Answer: have a good Christmas. Hope a tree does not fall on you or a light blinds you or Santa becomes too fat and get get the presents down you chimney or you have a fire and he burns to death. Have a jolly Christmas:)
It provides light to a picture which reaches a sensor by shutter speed. Exposure brings out the light in pictures and is useful when you take a pic that is dark
To <span>giving an area more focus on the problem.
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