Extended exposure modes, Bulb mode, Time mode – Mamiya 645 AF User Manual
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Extended Exposure Modes
(Bulb and Time Modes)
To expose the film for extended times (over 30 seconds), set the shutter speed to bulb
or set the exposure mode setting dial to "T" (Time Mode).
Bulb Mode
The bulb mode uses electronic control, so the batteries are in constant use
during the entire exposure.
1. Turn the exposure mode setting dial and set it
to “M" (manual mode).
2. Turn the front dial counterclockwise to select
"bulb", then turn the rear dial to set the aperture.
3. Determine the composition, focus, then take the
picture. The shutter remains open as long as the
shutter release button is pressed.
Time Mode
The time mode uses mechanical control, so it is best suited for extended expo-
sures. The batteries are not used to keep the shutter open during the exposure.
1. Turn the exposure mode setting dial and set it
to "T" (time mode).
2. Turn the front or rear dial to set the aperture.
3. Press the shutter release button. Determine
the composition, focus, then press the shutter
release button. The shutter opens.
4. Once you have achieved the desired exposure, turn the exposure mode setting dial
to "X". The time exposure mode is canceled and the shutter closes.
*To prevent the camera from moving, use both
an electromagnetic cable release (sold
separately) and a tripod.
*When the BL (Backlight) button ”A” is
pressed, the main LCD panel and the maga-
zine LCD panel light for about 10 seconds.
This makes the liquid crystal display panels
easier to view in dark places, for example
when photographing night views.
*In the "X" exposure mode the lock function is
activated. To set a different mode, press the
exposure mode dial lock release button “B”
while turning the exposure mode setting dial.
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