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There
are
two power
zooming
speeds.
If
either
of the power zoom control knobs is
pressed only lightly, the focal length will
change
slower than if the knob
is
pressed
more firmly. Tracking
and zoom
ing
appears
still
smoother on the screen if you film
these shots as
24
frames per second.
Manual zoom control (on Nizo 801)
A special feature of this Nizo model is the
ability
to
switch
,off the
automatic
power
zoom and
vary the focal
leng·
t h with a
lever
(supplied with the camera). Hand
zoomi
ng
enables
you to determine the speed of
apparent
movement accurately, and also
permits very rapid zooms during
a
shot by
moving the lever round
as
fast
as
possible.
The
lever
should
be screwed to the mount-
ing on
the
focal
length
scale. The power
zoom
mechanism is switched off (and the
lever
becomes
easier
to move) when the
mark on the black knurled ring between the
focal length scale and the camera body is
turned fully clockwise until opposite the 0
mark on the body.
Camera running
speeds
Slow motion facilities (filming speed
switch 1)
The normal running speed of the camera
is 18 frames per second, each frame being
exposed for '
/43rd
of
a
second
.
Any filming
speed above 18 frames per second setting,
will result in a slow motion effect, and all
filming
speeds
below 18 frames per second
wil'
l produce a
speeded-up
effect if projec-
ted at the normal setting.
With the
aid
of filming
speed switch
1, you
can
change from the standard running
speed of 18 frames per second to the slow
motion speeds of
24
or
54
frames per se-
cond
.
If
film shot at
24
frames per second
is projected
at
normal speed, all
move-
ments will appear '
/J
rd
slower.
This is not
the same as genuine slow motion, but is
useful if the camera
is
moved over a long
distance, for
example
during
a
long
pan or
when filming from a car being driven
alo
ng
a
rough road
.
54
frames per second is
a
genuine slow
motion
speed.
When projected
at
18 frames
per second, scenes win be prolonged to
three times their original length
.
Fast move-
ments filmed in this way can be
studied at
leisure during projection
.
Since one
se-
cond's
filming time yields three
seconds
on the
screen,
filming
at
the
slow
motion
speed is
sometimes
a
way to
gain a
better
impression
of
sudden
or very brief
events.
The automatic
slow motion device on your
14
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