Panasonic NV-VS3A - Manual (Page 81)

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■ Functional Diagram of the Auto Focus Function
O Focusing Lens 0 CCD Image Sensor
© Signal Processing 0 Microprocessor
0 Focusing Lens Motor 0 Picture Signal for
Recording
0 Focusing Lens © Finder Screen
© Image area on which the Auto Focus Function adjusts the
focus
When you aim the Movie Camera at the subject that you want
to record, the microprocessor determines {based on the
information about the vertical contours in the picture signal
received by the CCD Image Sensor) whether the subject in the
middle of the picture is properly focused. If not optimally
focused, it quickly moves the focusing lens in tiny steps from
the previous focus setting 0 or 0 until the vertical contours
of the subject become sharpest Q.
•As this Movie Camera automatically adjusts the focus based
on the information on the subject’s vertical contours, precise
focusing is not possible for subjects with weak vertical
contours (-» 55).
• Unlike the human eye, the Movie Camera’s Auto Focus
System cannot change the focus from a distant to a close
subject instantaneously.
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