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dark inside and has a small opening covered by a set of mirrors and a lens. A photographer adjusts the camera to focus on an image by moving the lens forward or backward. A device called a shutter controls the amount of light going into the camera. When a button is pressed, the shutter opens to allow light in. When the shutter closes, light is blocked. the shutter speed allows the camera to capture th image of a quickly moving object, such asa speeding car. The picture taken with a slow shutter speed would reveal only the car's blurry shape, but a person seeing this picture would get a sense of how fast the car is moving. The aperture of a camera is a hole at the front of the camera. Adjusting the aperture allows photographers to take pictures in different levels of light. In bright light, the aperture is aneaned a littla tn lat in a cmall amniint of linht Photographers capture moving objects with a fast shutter speed. The aperture is opened wide when the light is dim. An open shutter allows light into the camera. The closed shutter blocks light from entering