Adjusting The Viewfinder Eyepiece; Setting Filming Speeds - BEAULIEU 4008 ZM II User Manual

4° Adjusting the vlewflnder eyepiece
The zoom being in the wide-angle position (6 mm in the case of
the standard lens), and the focussing ring set to infinity open the
diaphragm to maximum aperture and put the ground glass screen
in place by means of the knob. Aim at an object over 150 ft distant
and rotate the eyepiece ring until the sublect is perfectly sharp on
the screen.
The viewfinder is now adjusted once
and
for all An operator who
usually wears glasses can, for more comfortable viewing, remove
them and focus with the naked eye in accordance with his own
eyesight (within tolerance limits of - 2 to
+
2 diopters). The
eyepiece focussing ring can be locked by means of the screw (31).
5° Setting filming speeds
Bring. the speed selected on the dial opposite the mark.
The 4008ZM 2 will automatically correct diaphragm apertures;
this means you can change filming speed as you wish while
filming.
Normal filming speed is 18 fps. If this speed is decreased, an
accelerated motion will appear on projection; this becomes very
great when filming is done at 2 fps. (ninefold acceleration) (32).
If this speed is increased to between 18 and 70 fps., slow-motion
effects making it possible to break down and analyze movements
are obtained (a pole-vaulter, for example).
The speed of two fps.
- allows filming under very poor lighting conditions (church inte-
riors) without addition of artificial lighting, since the exposure
time at this speed is very long: 1/7 second;
- makes It possible to analyze very slow movements. Example:
a watch filmed at two fps will, on projecting the film, give a quite
extraordinary effect, the seconds hand completing a revolution 32
19
31