Canon EOS 1V Troubleshooting Guide Page 120

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Basic Photography Terms
Exposure
Exposure occurs when the film is exposed to light. Correct exposure is
obtained when the film is exposed to a proper amount of light in
accordance with the film’s sensitivity to light. The correct exposure is
adjusted with the camera’s shutter speed and aperture.
Shutter speed
The shutter speed is the length of time the camera’s shutter opens to
expose the film to the light coming through the lens. The shutter speed is
displayed on the camera’s LCD panel and in the viewfinder. It ranges from
30 to 1/8000 sec. and bulb.
Aperture
The aperture setting (f-number)
indicates the size of the aperture
opening in the lens. It is used to adjust
the amount of light striking the film.
The aperture setting is displayed on
the camera’s LCD panel and in the
viewfinder. It can range anywhere from
1.0 to 91, depending on the lens
attached to the camera.
ISO film speed
The ISO film speed indicates the film’s sensitivity to light. The higher the
film speed, the more sensitive the film is. Therefore, ISO 400 and higher-
speed films are suited for low-light conditions. The ISO film speed is set in
accordance with standards set by the International Standardization
Organization (ISO).
A film speed from 6 to 6400 can be set with the camera. The film speed is
displayed on the LCD panel and in the viewfinder.
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