Pentax 645 645 Manual - Page 34

SWITCHING TO "A" (AUTO) AND SETTING PHOTOGRAPHIC MODE Aperture auto lock button "A" (auto) Up button Switching to "A" (Auto) To set the lens aperture ring to the "A" (Auto) position, align the ring's aperture - "A" index (green) with • index while pressing the aperture auto lock button. To release the auto lock, turn the ring to the desired f-number (except "A") while pressing the "A"-lock button. • Press the aperture auto lock button only when turning the ring from the "A" position to the largest f-number If/22 in this case) or vice versa. The following exposure modes can be set depending on the position of the aperture ring: L S a • t 645 40 016 "I 4) 1 I riP Down button Mode button 32 "A" (auto) Respective f/stops (other than "A") Programmed AE Aperture-priority AE Shutter-priority AE Aperture-priority AE Metered manual (1/60 sec., fixed) B (Bulb)