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■Focus
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.
Human Eyes
Human eyes have lenses as well, and when we look at
objects at different distances, the shape of these lenses
changes automatically so that we can always see these
objects clearly.
Movie Camera
The image of the subject enters the Movie Camera
through the lens and is converted into an electric signal
(video signal) for recording onto magnetic tape. The
focus is adjusted either manually or automatically by
moving a focusing lens,
Auto Focus Adjustment
The Auto Focus System automatically moves the internal
focusing lens forward or backward and adjusts the focus
so that the subject can be seen clearly.
The Auto Focus Adjustment has the following
characteristics:
• It adjusts until the vertical contours of the subject are
as sharp and clean as possible.
• It adjusts the focus on the subjects with strong contrast.
• It adjusts the focus on the subject in the centre of the
Finder.
Unlike human eyes, the lens of the Movie Camera
cannot instantaneously change the focus from a nearby
to a distant subject.
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