Exposure

The amount of light hitting the film is called the exposure. To get a photograph that is not too dark or not too light the photographer uses the f-stops and shutter speeds to control the amount of light hitting the film. The photographer determines how much light is needed by using a light meter, by […]

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Aperture

In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An optical system typically has many openings or structures that limit the […]

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Shutter Speed

In photography, shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera’s shutter is open when taking a photograph. The amount of light that reaches the film or image sensor is proportional to the exposure time. ‚Äč1/500 of […]

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Film Speed / ISO

Film speed is the measure of a photographic film’s sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. A closely related ISO system is used to describe the relationship between exposure and output image lightness in digital cameras. Relatively insensitive film, with a correspondingly lower […]

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