Pentax 645 - APERTURE-PRIORITY AE MODE

APERTURE-PRIORITY AE MODE
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Aperture-priority AE
Predetermine the f/stop to meet with a given
photographic situation; the shutter speed will
automatically adjust itself and provide the proper
exposure in line with the subject's brightness. This
method is ideally suited whenever the depth-of-field
is considered important in general or portrait
photography.
1. In this mode, the "Auto" and f/stop are
externally displayed in the LCD window.
Whenever a mode is switched from another to
this particular setting, the display can be made
visual by depressing the selecting button
(either "up" or "down") and the mode button
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simultaneously,
2. Desired selection of the f/stop can be effected
with the depressing of the "up" or "down"
selecting button. The "up" button should be
operated when the aperture choice is toward the
minimum aperture (example, f/22); the "down"
button, when the aperture desired is toward the
maximum aperture opening (f/2.8, etc.). A
single depressing moves the value in 1/2
incremental stops, while continuous f/stop
increments are possible by maintaining pressure
upon the selecting button.
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