Canon EOS 5000 - Manual (Page 48)

VI. OTHER INFORMATION
This section contains data to help you get the best from your camera. It
contains an explanation of the basic terms used in photography, some
tips on how to use the camera's various functions when taking pictures,
and an introduction to some of the accessories available.
Correct Exposure
To ensure correct exposure of the film installed in the camera with the
light passing through the lens, the amount of light is controlled by a
combination of shutter speed and aperture value. The exposure is said to
be correct when the level of light reaching the film is such that the bright
and dark parts of the picture is neither excessive nor insufficient.
Automatic Exposure (AE)
The camera has a mechanism which automatically sets the correct
exposure by controlling the aperture and shutter speed according to the
brightness of the scene and according to the camera’s exposure setting
program. Exposure is set according to the programs for the camera’s
image zone and shutter-priority zone settings.
Shutter Speed
The shutter in the camera body controls the length of time that the film is
exposed to light. The length of time that the shutter remains open is called
the shutter speed. The shutter speeds are shown on the command dial,
ranging from 2000 (1/2000th of a second) to 8 (1/8th of a second), and B
(bulb).
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