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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 programmed 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 combinations 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 behaves 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
the aperture for correct exposure. Of course, if it shifts to a shutter speed lower than 1/60 sec., it is advisable to use a tripod and a cable release or to switch to flash photo- graphy.
The advantage of this particular mode is that it takes your mind completely off exposure so that you can concentrate on your subject.
Programmed Combinations of Shutter Speed and Aperture in Programmed AE (with ASA 100 film)
—- — - — indicates programmed combina- tions when a lens with a maximum aperture of f/2.8 is used.
- - - - - - indicates programmed combinations when a lens with a maximum aperture of f/1.4 is used.