A correctly exposed photograph will be one where the optimal amount of light will fall on the focal plane. Exposure on to film will create an image just as it does in for each individual pixel on our digital CCD. Too much light and the highlights will be blown out and the picture will be washed away in white light. Too little light and the image will be dark and less colourful. Correct exposure is a balance between shutter speed, which lets light in over a period of time, and aperture, which is a hole that depending on the size, will allow more or less light to enter the light tight box on our camera.
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