OPERATION OF CAMERA CON Setting the Aperture
The ring fitted at the base of the lens adjusts the size of
the aperture (or opening) in the iris diaphragm. To pre-
set the lens aperture, turn the aperture ring until the de-
sired f/number setting on the scale is aligned with the
index mark provided on the
lens.
The iris diaphragm can
also be set to intermediate apertures between the click-
stop settings for more precise exposures.
ROLS — continued Film-Advance Lever
The film-advance lever simultaneously advances the
film,
cocks the shutter and operates the frame counter.
It also switches on the exposure meter in the finder
and unlocks the shutter-release button. To advance the
film,
stroke the lever with the right thumb in a single
stroke totaling only 135°. A built-in locking device
prevents the shutter from being released unless it is
fully cocked and the film advanced a full frame. At the
completion of film advance, release the lever and it
will return to the 30° standoff position ready for shut-
ter release.
Note:
Do not apply pressure to the film-advance lever while
making an exposure.