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Reproduced for Historical & Reference purposes by Paul M. Provencher -
http://whitemetal.com
12
Automatic Diaphragm*
When the preview lever is in the "AUTO"
(automatic) position, and the exposure meter is
turned to "OFF", the fully automatic diaphragm
is at its largest aperture at all times, except for
the instant of exposure, no matter what
aperture is set on the diaphragm ring. When
you release the shutter, the diaphragm
automatically stops down to the predetermined
aperture and the shutter curtains start travelling
instantly. When the exposure is completed, the
diaphragm reopens to maximum aperture
completely automatically and you are ready to
compose, focus and shoot your next pictures. If
you wish to visually check exact depth-of-field
before making the exposure, move the preview
lever to the "MAN" (manual) position. This stops
the diaphragm to the aperture selected and
shows you exactly how much depth-of-field will
appear in your picture. The preview lever may
be moved back to "AUTO" (automatic) position
before or after making your exposure, or, if you
are making pictures in bright sunlight, it may be
left in manual position, which permits a constant
check of depth of field.
OUT OF FOCUS
IN FOCUS
* When the exposure meter switch is turn to
the "on" position, the lens diaphragm changes
from the automatic to manual position even
though the preview lever is in the "AUTO"
(automatic) position. When the shutter is
released, the lens diaphragm will automatically
return to its automatic position if the lever is set
on "AUTO"