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Index
Mark
Lens
Pre·Se
t
Ape
rtur
e
Ring
Lens Visua
l
Aperture
Ring
Knerled
Focusing
Ring
The Super Canomatic
lens is equipped with the
automatic pre-set diaphragm.
Ordinarily, the lens
is
wide open, but when the shutter is actuated, the
lens is closed down automatically to the pre-selected
aperture stop.
When the shutter operation is com-
ple
t
ed, it automatically reopens to full aperture.
Automatic Pre-Set Diaphragm
This is the mechanism for adjusting the size of the
aperture
which is
automatically closed down.
If
thi
s
ring
is turned and set to the mark, the lens
is
closed
down to the pre-selected aperture stop for
the instant that the shutter is released.
Manual Aperture Ring
If
this ring is turned
,
the lens can be opened or
closed without relation to the pre-selected aperture
stop.
Through use of this ring, you
can
see the
actual
sharpness
of picture. When using the manual
aperture
mechanism,
always have the automatic
pre-set aperture ring at the full opening position,
otherwise
internal
automatic
mechanism will
be
strained.
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