Explanation Of Terms - Panasonic NV-VZ18GC Operating Instructions Manual

Explanation of Terms

ª How the White Balance (Tint)
Adjustment Works
Video recording takes place under various light
sources, from sunlight as the main natural light
source to a wide range of artificial light sources
such as fluorescent lamps. As each of these
light sources has a different colour temperature,
each of them gives the colours of the subject a
slightly different tint.
Human eyes can easily adjust to different kinds
of lighting and recognize an object as having the
same colour, even under different light sources.
The eye of the Movie Camera (lens), however,
cannot adapt to the change in lighting and is
influenced by the lighting. Therefore, depending
on the light source, the picture would be
recorded with a bluish or reddish tint. To
minimize the influence of the lighting on the
colours of the subject, an adjustment called
White Balance Adjustment is necessary.
Auto White Balance
This Movie Camera offers both Auto White
Balance Adjustment and Manual White Balance
Adjustment. When the Movie Camera is in the
Full Auto Mode, the internal system of the Movie
Camera automatically determines the
temperature of the light and compensates the
tint of the subject accordingly. White is the basic
colour by which the tint is determined. Because
this adjustment is performed based on the white
colour, it is called White Balance Adjustment.
The optimum settings for several light sources
are stored in the memory of the Movie Camera.
The internal microcomputer compares the
colour temperature of the light received by the
White Balance Sensor positioned on the front of
the Movie Camera with the colour stored in
memory, and selects the setting for the most
similar tint.
Be careful not to cover the White Balance
Sensor ( ) with your hand, etc.
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Manual White Balance
Although this Movie Camera stores the optimum
settings for several light sources in memory to
correctly judge the white colour, it cannot cope
with all light sources. Therefore, to record under
those types of lighting which cannot be correctly
adjusted with Auto White Balance Adjustment,
use Manual White Balance Adjustment. (
ª How the Focus Adjustment Works
If you look at an object through a magnifying
glass and move it closer or further away from
your eye, you will reach a point where the object
becomes clearly visible. Being focused or in
focus means that the subject can be seen with
optimum clarity and sharpness. The distance
between the lens and the point where the rays
of light come together is called Focal Distance
or Focal Length and depends on the size and
shape of the lens.
Human eyes have lenses too, and when we look
at objects at different distances, the shape of
these lenses changes automatically so that we
can always see the objects clearly.
Others
Auto Focus Adjustment
The image of the subject enters the Movie
Camera through the lens and is converted into
an electrical signal (video signal) for recording
onto tape. Based on this signal, the Auto Focus
System automatically adjusts the focal distance
by moving the focusing lens forward or
backward.
The focus is adjusted on the subject in the
centre of the Viewfinder.
)
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