The director of photography is responsible for keeping the shooting of the film on time and within budget. They are also responsible for how the image looks and the story that is told in a single shot.
Exposure-The amount of light that gets into the image. Four factors regulate exposure.
1. Amount of light- The sun produces more light than any light bulb. If the camera produces an image that looks normal under bright sunlight it will - with the same settings- produce underexposed in a scene lit by a dim tungsten bulb.
2. Aperture- The opening in the camera lens has the capability to block or admit light. The narrower the aperture, the less light enters the camera, thus creating dark images.
3. Shutter Speed- The plate located between the lens and the camera recording
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