Panasonic AGDVC20P - 3 CCD DV CAMCORDER Operating Instructions Manual - Page 39
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Explanation of terms
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Automatic white balance
White balance adjustment recognizes the color of light and
adjusts so the white color will become a pure white. The
camera-recorder determines the hue of light that comes
through the lens and white balance sensor, thereby judging the
recording condition, and selects the closest hue setting. This is
called automatic white balance adjustment. However, since the
camera-recorder only stores white color information under
several light sources, automatic white balance adjustment does
not function normally under the other light sources.
10 000K
9 000K
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Outside of the effective range of automatic white balance
adjustment, the image will become reddish or bluish. Even
within the effective range of automatic white balance
adjustment, the automatic white balance adjustment may not
function properly if there is more than one light source. For light
outside the functional auto white balance adjustment range,
use the manual white balance adjustment mode.
1) The effective range of automatic white balance adjustment
on this camera-recorder
2) Blue sky
3) TV screen
4) Cloudy sky (rain)
5) Sunlight
6) White fluorescent lamp
7) 2 hours after sunrise or before sunset
8) 1 hour after sunrise or before sunset
9) Halogen light bulb
10) Incandescent light bulb
11) Sunrise or sunset
12) Candlelight
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
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Others
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White balance
The image recorded by the camera-recorder may become
bluish or reddish under the influence of light sources. To avoid
such phenomena, adjust the white balance.
White balance adjustment determines the white color under
different light sources. By recognizing which is the white color
under sunlight and which is the white color under a fluorescent
lamp, the camera-recorder can adjust the balance among the
other colors.
Since white color is the reference of all colors (light), the
camera-recorder can record pictures in a natural hue if it can
recognize the reference white color.
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Auto focus
Auto focus automatically moves the focusing lens forward and
backward inside the camera-recorder to bring the subject into
focus.
Auto focus has the following characteristics
≥Adjusts so that the vertical lines of a subject are seen more
clearly.
≥Attempts to bring an object with higher contrast into focus.
≥Focuses on the screen center only.
Due to these characteristics, auto focus does not work correctly
in the following situations. Record pictures in the manual focus
mode.
Recording a subject with one end located closer to the
camera-recorder and the other end farther away from it
≥As auto focus adjusts at the center of an image, it may be
impossible to focus on a subject that is located in both the
foreground and background.
Recording a subject behind dirty or dusty glass
≥The subject behind the glass will not be focused because
the focus is on the dirty glass.
Recording a subject that is surrounded by objects with
glossy surfaces or by highly reflective objects
≥The recording subject may become blurry because the
camera-recorder focuses on the objects with glossy
surfaces or on highly reflective objects.
Recording a subject in dark surroundings
≥The camera-recorder cannot focus correctly because the
light information that comes through the lens decreases
considerably.
Recording a fast-moving subject
≥As the focus lens-inside moves mechanically, it cannot
keep up with a fast-moving subject.
Recording a subject with little contrast
≥A subject with little contrast, such as a white wall, may
become blurry because the camera-recorder achieves
focus based upon the vertical lines of an image.
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