Sony BETAMOVIE BMC-220 사용 설명서 - 페이지 33
{카테고리_이름} Sony BETAMOVIE BMC-220에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Sony BETAMOVIE BMC-220 37 페이지.
페이지 인쇄UNDERSTANDING LIGHT AND COLOR
Brightness levels
The single greatest influence on picture quality is the brightness
level.
Using
the
following
chart as a
reference,
take a
few minutes to familiarize yourself
with
brig
htness levels to im-
prove your recording
.
ND filter re·
Unit: lux
qui red
100,000
10,000
Normal
record
ing
1,000
500
Video
light
recom·
mended
100
Video
light
req
uired
10
Snow-covered mounta
ins
Snow
fields
Sandy
beach,
clear
day
in summer
Clear
day,
mid·day(100,000)
Clear
day,
mid·aflernoon
(35,000)
Overcast day, mid·day
(32,000)
Overcast
day,
one hour
after
sunrise
(2,000)
Office
lit
by
fluorescent
lamps,
near window
(1
,000)
Clear day, one hour before
sunset
(1,000)
Department
store
counter (500""
700)
Station
wicket
(650)
Office
lit
by
flu
orescent lamps
(400""
500)
Room lit by two 30 W
Fluorescent
lamps
(300)
Subway
stati
on platform (300)
Arcad
e at night
(150""200)
Theater lobby (15""35)
Candle light
(10""15)
When to use an
ND
filter
Exceptionally
bright
scenes such as
sunny
days
at the
beach
in summer
or
on
snow
f
ields
in winter
will look
"washed out
"
when record-
ed
.
To make these scenes recorded
nat urally,
an ND fi lter is required
.
(Refer to the chart)
Three
types
are available-ND2
, ND4,
ND8-which reduce
t
he
exposure
level
to
1/2,
1/4,
and
1/8, respectively.
Select filters to match the
lens
diameter
of 52
mm.
Color temperature-how it effects white balance adjustment
If
the temperature of an object continues to
increase,
it will eventually
begin
giving
off
light.
At
this
time,
there
is
a fixed
relationship
between
the
object's
temperature and its
"
light
colo
r.
"
The temperature of
the object
radiating
the
light is expressed in absolute
temperatu re
(°
K).
This is
also
known
as the color
temperature,
which in turn stands
for
"
light
color."
As
color
temperature
increases,
the
light
color
changes
from red to yellow
to
white to
blue.
Natural li ght
color
temperature
('
K)
Di rect
sunlight
Ti
me
after
sunrise/
before
sunset
2
hr.
1 hr.
40 min.
30
min.
20
min.
Sunri se/sunset
Co lo
r
c hange
10,000('
K)
10,000('
K)
8,000
8,000
7,000
Blue
7,000
D
6,000
6,000
5,000
5,000
4,000
Whi
te
4,ooo
Artif ic
ial
light col or
t
em perat ure
('
K)
'
\
'
(
I
I
I /
Fl
uorescent
~
.:::
) }
lamp
(c
lear)
~
JJ1I
-
I
I
I
1
\
,
~
Fluorescent
lamp (w
hite)
Flourescent
3,500
3 500
lamp (off wh it'.V
3,200
3,000
000
Yellow
2,500
2,500
0
2,000
Red
2,000
Stud
io
lamp
/
Halogan
lamp
/
/
1
,
Tungsten
lamp
'
'
\(
I
Candle
lig ht
33