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may be used
or the scene
illuminated with
halogen floodlights
.
Manual
control of
lens
aperture
The automatic system can be switched
off
and any
desired
aperture setting selected
by hand. The
exposure control
knob must
first be turned from
«automatic»
to
«manu-
al». The pointer on
the
exposure scale
in
the viewfinder will now respond to rotary
movement
of
t~e
control
knob
.
In this way the
exposure
values
calculated
by
the
automatic system can be corrected,
for
example
if the most important part of
the scene
is
considerably
lighter
or darker
than the
surroundings.
The
light
emitted by
the
object to
be filmed
should
then
be
measured with the
automatic exposure sy-
stem by bringing
the
camera
much
closer,
or
else by zooming
in
on
the
object before
taking a
reading,
so
that the
surroundings
are eliminated.
The iris
setting recorded
by
the
exposure meter
in the
viewfinder should
then be selected by
hand
.
Example: The automatic exposure system
indicates figure 16 when
filming a subject
in the middle
of an area covered
with
snow
and
in
bright sunlight.
If
the scene is actu-
ally
filmed
at
this
exposure setting, the sub-
ject will
be far
too
dark, as the camera
will
expose
the
surrounding snow area correct-
ly. In
other words, the exposure requires
correction for best
resu
Its.
Another
example:
When filming subjects
against the
lig'ht, they will normally
appear
as
silhouettes;
if you wish to bring out the
full details of your
subject
on the screen,
turn round before
starting
to film
and
mea-
sure
exposure 'with the light'. Select this
exposure
value manually and then film
your
scene against
the light.
Always remember to return the
exposure
control
knob from
«manual»
to
«automatic»
after
you have completed
a
specially
ex-
posed shot
0;
this kind.
In most
cases
requiring
additional expo-
sure,
the
«plus
1
II
control (described in
the
previous
section)
will normally
enable the
desired results to
be
obtained.
Rangefinding and focusing
Viewfinder
eyepiece
adjustment
(diopter compensation)
Before the through-the-Iens rangefinding
system can
be used, the viewfinder must be
adjusted
to suit the
cameraman's eyesight
(as with binoculars). The eyepiece of the
Nizo
camera
is provided with
a
knurled
ring
.
Turn this ring
'
until the horizontal divi-
sion across
the
center
to the rangefinder
appears
perfectly sharp. This wHI be
easier
if the
camera
is kept pointed at a plain
background (walls,
sky). The adjustment
can
be
carried
out
at any
focal length or
focus
setting.
The
split
image rangefinder
The
split
image rangefinder operates with
two measuring prisms which
appear
in the
center of
the viewfinder as
a circle
divided
by a
horizontal line. If the vertical outlines
of the
subject
being filmed
are
displaced
to one
side as
they
cross
the horizontal
line of the rangefinder, the focusing
ring
on
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