Panasonic NV-RX1A - Page 33

H The Auto Focus Mechanism of this Movie Camera
@in Movie Cameras, one of the following two methads is generally used:
1)
Infrared
Focusing:
The
recording
distance
is
calculated
and
adjusted
based
on
the
time
it
takes
for
an
infrared
signal
emitted
from
the
front
of
the
Movie
Camera
to
be
bounced
off
the
subject
and
received
back
by
a
sensor
on
the
Movie
Camera.
2)
Camera-Internal
Electronic
Focusing:
The
focus
is
adjusted
based
exclusively
on
the
image
received
by
the
Movie
Camera
and
the
resulting
picture
signal.
This
Panasonic
Movie
Camera
employs
the
Internal
Electronic
Focusing
Method.
As
shown
in
Fig.
1
on
the
left
page,
when
you
aim
the
Movie
Camera
at
the
subject
you
want
to
record,
the
microprocessor
moves
the
lens
little
by
little
based
on
the
information
about
vertical
contours
of
the
subject
in
the
picture
signal.
At
the
point
where
the
vertical
contours
of
the
subject
become
sharpest,
it
judges
that
the
subject
is
in
focus
and
stops
the
lens.
(See
Fig.
2.)
Special
Characteristics
of
the
Movie
Camera’s
Automatic
Focus
Adjustment
Mode
(A) It adjusts the focus for sharpest vertical lines.
(B)
It
adjusts
the
focus
on
parts
of
the
subject
with
strong
contrast.
(C)
It
adjusts
the
focus
only
on
the
centre
part
of
the
picture
on
the
viewfinder
screen.
(The
area
where
the
subject
is
in
focus
is
much
smaller
than
the
TV
screen,
as
shown
in
the
Fig.
3.)
Unlike
the
human
eyes,
however,
the
Movie
Camera’s
Auto
Focus
System
cannot
change
the
focus
froma
distant
to
a
close
subject
without
any
delay.
Therefore,
use
the
Manual
Focus
Mode
when
you
are
going
to
record
the
following
types
of
subjects
or
in
the
following
kinds
of
places:
Advanced Operations B
Subjects
with
Shiny
Surfaces
Fast-moving
Subjects Subjects
with
Weak
Contrast
or
Much
Light
Reflection
As
the
lens
is
moved
As
the
Movie
Camera
adjusts
the
As
the
Movie
Camera
adjusts
the
|
mechanically,
it
cannot
follow
focus
based
on
vertical
contours
focus
on
the
objects
with
shiny
fast-moving
subjects
without
in
the
picture,
subjects
with
fittle
surfaces
or
much
light
reflection,
delay.
contrast
may
be
out
of
focus.
the
subject
may
go
out
of
focus.
@Subjects
like
a
quickly
and
@When
recording
a
flat
white
@The
subject
may
be
out
of
focus
abruptly
moving
children
may
wall,
for
example,
the
Movie
when
it
is
recorded
at
the
temporarily
go
out
of
focus.
Camera
has
no
information
by
seaside
in
the
evening,
under
which
it
can
adjust
the
focus
firework
illumination
or
when
correctly.
special kinds of lights are used.
el
Subjects
with
a
Part
of
It
Near
Subjects
Behind
Moving
Subjects
with
Dark
Surfaces
the
Movie
Camera
and
Another
|
Objects
if
the
amount
of
light
entering
the
Part
Far
Away
from
It
As
the
focus
is
adjusted
on
the
lens
is
greatly
reduced,
the
Movie
As
the
focus
is
adjusted
on
the
person
or
object
that
passes
Camera
has
very
little
information
centre
part
of
the
image,
it
is
between
the
Movie
Camera
and
by
which
to
adjust
the
focus.
difficult
to
bring
the
distant
part
of
|
the
subject,
the
subject
When
recording
persons
in
dark
the
subject
in
focus.
temporarily
go
out
of
focus.
surroundings,
precise
focusing
®When
you
want
to
record
a
®When
recording
a
subject
may
not
be
possible.
person
with
a
distant
mountain
across
a
street
on
which
cars
behind,
it
is
not
possible
to
are
running,
the
subjects
may
focus
on
both.
go
in
and
out
of
focus.
Precise
focusing
may
also
not
be
possible
for
subjects
that
have
no
vertical
contours
or
are
behind
glass
covered
with
dirt,
dust
or
water
droplets.
Finger
print
marks
on
lens
may
cause
focus
not
to
operate
clearly.
When
at
wide
angle
the
Movie
Camera
may
attempt
to
focus
onto
the
finger
prints
(treating
them
as
a
MACRO
Subject).
Check
and
clean
the
lens
correctly.
elf
recording
in
a
moving
vehicle
focus
accuracy
may
be
impaired
due
to
the
following:
a)
Dirt
or
water
droplets
on
the
car
windows
and
recording
through
glass
may
change
the
focus
point
b)
Scenery
changing
too
quickly,
no
time
for
the
Movie
Camera
to
adjust
focus
c)
Distance
between
subject
and
Movie
Camera
always
changing
We suggest you use Manual Focus, Please refer to p. 30 and 31 “Recording in Manual Focus Mode’ in your
operating instructions.
33