Mamiya RB67 - Roll Film Holder Safety Devices; Shutter Release Lock with Dark Slide; Slide Lock Operation without Dark Slide

• Roll Film Holder Safety Devices
The following safety devices function when the Mamiya RB67 roll film holder is attached to the camera.
1. The shutter release button cannot be
pressed while the dark slide is in the holder.
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If the dark slide is pulled out slightly, the
shutter release button can be pressed . This
operation can
be utilized for shutter testing.
In this case, the double-exposure warning
signal turns red. When the holder is loaded ,
do not pull out the dark slide beyond the
tip
of the triangular hole in the top center
of the dark slide, otherwise the film may be
fogged.
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2. When a dark slide is completely in-
serted, the
slide lock release lever (20) is
automatica ll y released, and the sHde locks
(17) can be slid without press in g the re-
lease levers .
On
the other hand, if the dark slide is not
inserted , the slide locks will not move un-
less the release lever is pressed. This pre-
vents accident ly removing the film holder
from the camera and fogging the film.