Movies for TV - Early Television Foundation

32
FUNDAMENTALS
vertical drive The voltage which causes the vertical movement
of the scanning beam in a television camera.
video The picture signal: from the Latin videre, to see; literally,
"I see."
walk-through A rehearsal which is conducted without cameras.
western electric sound system (variable density) A system of
sound recording in which the sound is caused to make the
intensity of light falling on the film vary in step with it. A
loud sound produces a bright light. Similar to the variable-
area system except that instead of a sound track with tri-
angular appearance it looks like a row of piano keys. This
characteristic pattern is produced by the movements of two
ribbons in the galvanometer instead of a mirror. As they
spread apart more light passes and a heavier exposure is
made.
wide-angle lens A lens for short distance work which has a wide
angle of pickup so that a large area of the set can be photo-
graphed without having to get too far away.
wild motor An electric drive for a camera which is not synchronous
and will not, therefore, maintain an absolutely con-
stant speed. It is useless for lip sync work.
wipe A change of scene produced by the new picture apparently
pushing the old one off the screen. The change may be
vertical, horizontal, diagonal, semi-circular, etc. It is produced
mechanically in the optical printer.
work print The print produced from the original camera nega-
tive. All editing work is done on it, the negative never being
projected in case it becomes scratched and unfit for making
the finished print.
wow A variation in the speed of the audio reproducer which
causes the sound to change pitch.
zoomar lens A lens recently produced which makes it possible to
follow action, keeping it in focus all the time. Its range is
from very close up to the full length of a football field. It
has twenty-eight optical elements in it.