Exposure

• Exposure is how much light is allowed to touch the photograph while it is being taken.
• The shutter of a camera blocks all light from touching the film until you push the button.
• By setting the shutter speed you can control how long the shutter stays open.
• When light comes through the camera's lens, it passes through the aperture, which is a hole that lets in more light when its wide open and less light when its small
• The aperture can be controlled by setting the aperture setting or "F-stop", which controls how much light passes through the lens.
• Exposure is about different combinations of the shutter and f-stop settings.
• Exposure can drastically change how the finished photo looks.
• The shutter settings controls the amount of time the shutter is open. It is measured in seconds. Some shutter settings are 1/25, 1/500, 1, 1.5, 3, ect.
• Some f-stop settings are F/2.8, F/4, F/5.6, ect. The higher the F number is, the smaller the shutter is, and the less light gets in.
• F-stop values are incremented by stops and each stop is a standard value that allows 1/2 as much light through as the previous stop and 2x more light than the next stop.
• The shutter and the aperture are the two camera settings that control the amount of light.
• You cannot control the exposure if the camera is on "Auto", but if the camera is set on "P", you can change the exposure time. If the camera is on "S" you can set the shutter speed manually. If the camera is on "A", you can set the aperture speed manually. If the camera is on "M" you can set the shutter speed and aperture manually.