13
the lens should be turned until the vertical
outlines appear uninterrupted.
Before using the rangefinder, always
select
the longe
st
available focal length
(80,
56
or
48 mm, depending on the zoom lens
fitted
to your
Ni
zo camera).
Accurate
rangefinding and
focusing
is
of
particular
importance when
filming
at
long
focal lengths (from about
30
mm upwards),
filming
closeups at less than 3 m
(10
ft)
distance, using add-on adapter lenses
or
shooting in bad
light
(with the lens iris
wide
open).
Making best use of available depth
of
focus
The
Super-8 film format has been designed
to provide ample depth of focus. This can
be seen from the depth of focus chart sup-
plied with camera. At its widest angle
(7
or
8 mm), and up to average focal lengths
of
about
15
mm, the depth of focus of the
zoom lens makes absolutely accurate fo-
cusing unnecessary
for
average shots
(even when filming at
wide
apertures). The
4 m mark in the lens focusing ring and the
15
mm
mark on the zoom lens focal length
scale are
colored
red. If you
fi
.lm at these
settings, your pictures
will
be sharp from a
distance of 1.
74
m
(5
.7 ft) to infinity, even
if
poor
l
ight
conditions
cause the automa-
tic
exposure system to open
up
to aperture
setting
4.
This generous
depth
of focus
will
prove of great value when you have no time
left to take
an
accurate reading on the
rangefinder.
At
shorter focal lengths the
depth of focus is
incr
eased, whereas longer
focal lengths have very
little
depth
of focus.
This is the reason why
your
shots may
not
remain sharp
if
you zoom from wide angle
to telephoto end of the focal length scale.
Selecting focal length
General description of zoom lens
The zoom lens (actually a «variable focal
length
lens») enables you to film entire
sequences
incorpor
ating general wide-
angle shots, semi-closeups and extreme
closeups if required,
without
changing the
position of the camera. The zoom lens uses
special individual lens c
lu
sters to provide
a variety of focal lengths and filming
angles.
On
the Nizo S
800
zoom lens, the
acceptance
angle of the lens varies be-
tween
42
° and 3°50'. The longer the focal
length at which you are filming, the more
important
it becomes to hold the camera
absolutely steady.
At
focal lengths above
approximately
40
mm, you must
support
the
camera
or
your
hand absolutely
firmly
if
you are not using a tripod.
In
addition, the
automatic
power
zoom enables you to imi-
tate tracking shots,
for
which the camera is
normally mounted on a mobile dolly.
Varying the focal length
You can sel
ect
the desired focal length be-
fore
start
ing
to
film by moving the small
handle of the focal length scale. This ena-
bles you to
start
your
shot at the desired
focal length
without
wasting film.
The
control
buttons
for
the automatic
power
zoom are
locat
ed on the housing of
the Nizo camera. The black knob nearer the
lens reduces the focal length (wide angle),
the green
knob
on the eyepiece side in-
creases the focal length (telephoto).
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