Canon A-1 Manuel d'utilisateur télécharger pdf (Page 79)

Programmed AE

When the AE mode selector is set to Tv and

the AT dial turned to “P” on the shutter

speed scale, the camera is set for program

med AE. Correct exposure, both aperture

and shutter speed, is automatically set by

the camera according to the brightness of

the subject and a programmed set of combi

nations of apertures and shutter speeds.

Metering control is done steplessly from a

combination of the highest shutter speed

and minimum aperture all the way to slower

shutter speeds and larger apertures.

Under some circumstances, the camera be

haves as if it were set for aperture priority

AE. For example, if lighting conditions are

so low that an aperture larger than the

maximum aperture of the lens would be

necessary, the maximum aperture remains

fixed, and the camera’s electronic control

automatically shifts to slower shutter speeds

until the shutter speed is balanced against

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Canon A-1 Manuel d'utilisateur Page 79