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Auto focus
Auto focus automatically moves the focusing lens
forward and backward inside the movie camera 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 centre 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 movie camera and the other end
farther away from it
≥As auto focus adjusts at the centre 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 movie camera focuses on the
objects with glossy surfaces or on highly
reflective objects.
Recording a subject in dark surroundings
≥The movie camera 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 movie
camera achieves focus based upon the
vertical lines of an image.
Others
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