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ed firmly to the tripod or rested on the
handgrip on a surface free from vibration.
The time-lapse intervals should then be ad-
justed
-
longer or
shorter
- to suit light
conditions. As in still photography, an
approximate
estimate
of
exposure
is usual-
ly
sufNcient,
since long
exposures are em-
ployed in light conditions which rule out
the possibility of
an
accidental overexpo-
sure and indeed in which any
extra
light
can only help to improve picture
quality.
The automatic
exposure control
on the
Nizo camera
can
therefore be allowed to
remain in operation.
After filming
at
increased
exposure,
do not
forget to return the variable
shutter
lever
to its normal
condition,
or
else
the first
frames of
all succeeding shots
filmed under
normal light conditions will be so
severely
overexposed as
to
appear
white on the
screen.
Automatic extended exposure
system
If you none the less wish to
employ
the
automatic exposure control,
place the
marking on filming
speed switch 2 against
the
setting «autom
.
B»,
and
remove the
lens hood from the front of the lens barrel.
In these light
conditions
the lens hood is
not required in
any case.
Next, pull the
variable shutter
lever past the detent button
into the
shaded area, as
described in the
preceding section of
this
manual.
If you now move the continuous-run
re-
lease on the opposite s.ide of the camera
base to the operating position, the sepa-
rate automatic exposure system will deter-
mine the elapsed-time filming speed (rate
of exposure of individual frames). You will
appreciate
that use of the
automatic ex-
tended
exposure control
is worthwhile only
in poor light conditions.
Warning: Make sure that the window below
the
namepl'
a te
on the front of the
camera
is
not obscured
:
as
it conceals the
special
automatic exposure
control cell. This is
provided
so
that your Nizo camera can (un
-
like the normal through-the-Iens
exposure
measurement system) measure general
exposure
levels without being unduly in-
fluenced by
individual
small-area light
sources,
for instance lamps or
candles.
Synchronized sound recording
and
filming
To the left of the carrying loop attachment
on the base of the Nizo
cameras
will be
found
a
connecting
socket
for the pilot-
tone lead to
a
tape recorder. These Nizo
camera
models incorporate
oscillators
(impulse transmitters) which transmit
a
1000 Hz impulse for
every
fourth frame
passing the
gate
.
These
are
recorded by
way
of
the
connecting
lead on one track of
the
tape.
The remaining tracks of the tape
are available
for the
actual sound
record-
ings.
The impulses
control
(in
accordance
with
the
standardized sound system)
the
run-
ning
speed
of the projector when the film
is
screened, and
thus keep the film images
and
the
sound
on tape
synchronized
.
The
Synton
FP tape coupler, supplied
by the
Braun
AG
company, should
be inserted
between
the tape recorder
and the
Braun
FP
7
projector,
which is provided with the
necessary
connections.
20
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