EXPOSURE MODE
Light reaching the film is controlled by shutter speed and lens aperture. The proper combination results in a correct exposure. Shutter speed and lens aperture settings are based on the ISO speed set for the film in use and the operation of the camera's exposure control system.
The relationship between aperture and shutter speed is as follows: One change in shutter speed either doubles or halves
the amount of light transmitted. For example, a shutter speed of 1/ 500 sec. passes half the light of 1/250 and double the light of 1/ 1000 sec. The aperture fiB passes half the light of f/ 5.6 and double the light of fl11. If the correct exposure for a scene is 1/ 500 at fiB, then we can also select 1/250 at fl11 or 111000 at f/5.6 and achieve the same exposure results, and so on.
Metering range
(for Matrix and
Metering range depends on the lens in use. With a lens having aperture from f12.8 to fl 32, metering range at ISO 100 will be from EV1 to EV23.
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