White Balance Adjustment; Using The Preset White Balance Settings - Sony DXC-D35 Service Manual

White Balance Adjustment

4
Arrange a white subject (paper, cloth, etc.) under
the same lighting conditions as for shooting, and
zoom in on it so that as far as possible the whole
screen is white.
The minimum white area requirements for the
adjustment are shown in the following figure.
Area of white within this
rectangle should be
equivalent to at least 10% of
Center of the screen
the image area.
approximately approximately
70% of the
70% of the
height of the width of the
image image
5
Push the WHT/BLK switch in the WHT direction
and release.
The white balance adjustment is carried out.
During the adjustment the legend "AUTO WHITE
-OP-" appears in the viewfinder.
After a few seconds the adjustment is complete,
and the legend in the viewfinder changes to
"AUTO WHITE -OK-" plus a color temperature,
as shown in the following figure.
AUTO WHITE
-OK-
3200K
The adjustment value is automatically saved in
memory A or B as selected above.
To save the white balance adjustment for different
lighting conditions, repeat steps 2 to 4 above. You can
save two different values for the white balance, in
memories A and B.
Note
When using a camera control unit or remote control
unit, if the W/B BALANCE switch of the control unit
is set to PRESET or MANUAL, it is not possible to
carry out white balance adjustment on the camera.
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Chapter 5 Adjustments and Settings
To recall a white balance value from memory
Before beginning shooting, set the W. BAL switch to
the A or B position. This automatically sets the
camera to the white balance adjustment saved in the
corresponding memory.
If white balance adjustment cannot be
completed automatically
The warning message "AUTO WHITE -NG-" appears
in the viewfinder.
Make the necessary corrections, then carry out the
process again.
Warning messages for white balance adjustment
Message Meaning and corrections to be made
AUTO WHITE Light level is too low.
-NG-
• Increase the illumination level, open
:LOW LIGHT
the iris, or use the GAIN switch to
TRY AGAIN increase the video signal level.
• Check the setting of the FILTER
control.
• After these checks, retry the
adjustment.
AUTO WHITE The subject is not white, or the lighting
-NG- level is too high.
: ?? • Use a white subject.
TRY AGAIN • Lower the illumination level, stop down
the iris, or use the GAIN switch to
decrease the video signal level.
• Check the setting of the FILTER
control.
• After these checks, retry the
adjustment.
AUTO WHITE The color temperature is too low. Try
-NG- the following, in this order of
:C.TEMP.LOW precedence.
CHG.FILTER (1) If the FILTER control is in position 2,
3 or 4, change it to position 1, then
TRY AGAIN
retry the adjustment.
(2) Check that the subject is completely
white, then retry the adjustment.
(3) The color temperature may be
outside the range of the camera. Fit
an appropriate color temperature
conversion filter, then retry the
adjustment.
The color temperature is too high. Try
AUTO WHITE
-NG- the following, in this order of
precedence.
:C.TEMP.HI
(1) If the FILTER control is in position 1,
CHG.FILTER
change it to position 2, 3 or 4, then
TRY AGAIN
retry the adjustment.
(2) Check that the subject is completely
white, then retry the adjustment.
(3) The color temperature may be
outside the range of the camera. Fit
an appropriate color temperature
conversion filter, then retry the
adjustment.
Message Meaning and corrections to be made
WHITE:PRESET The W. BAL switch is in the PRESET
position.
Move the W. BAL switch to the A or B
position.
The camera is outputting a color bar
BARS
signal.
Move the OUTPUT/DL/DCC+ switch to
one of the CAM positions.
Using the Preset White Balance
Settings
The camera provides two preset white balance settings,
for instant shooting with approximately the correct
adjustment. The preset white balance can be selected
between 2200 K and 4300 K when the FILTER control
is set to 1 and between 4600 K and 12000 K when the
FILTER control is set to 2, 3 or 4 (see page 59).
There are also particular shooting conditions under
which the preset values may give better results than the
human eye adjustment.
1
Set the W. BAL switch to PRESET.
2
Set the FILTER control.
The white balance is automatically adjusted for the
preset white balance selected in basic menu page 2
(see page 59).
Light Sources and Color
Temperature
Adjustment of the white balance to match the light
source is essential to ensure correct color rendering.
The color of a light source is indicated as a color
temperature in kelvins (K). It is higher for bluish light,
and lower for reddish light. When the camera is
shipped it is adjusted for use with video lights (halogen
lamps with a color temperature of 3200 K). For use
with other light sources, therefore, adjustment is
required.
First use the FILTER control to set the approximate
color temperature, then carry out white balance
adjustment.
The following table shows typical color temperature
values for different light sources.
Color temperatures of different light sources
Light source Color temperature (K)
Natural Artificial
Clear sky V 10,000
Light cloud 8,000
Cloudy or rainy Blue light 7,000
skies
V
6,000
Fluorescent light 5,000
(daylight white)
Direct sunlight, Mercury lighting v
noon
Fluorescent light White light
(white)
V
One hour after
sunrise or
before sunset Fluorescent light 4,000
(warm white)
3,500
Studio lighting v 3,200
Halogen lamps
Yellow light 3,000
and video lights
V
2,500
Thirty minutes Incandescent
after sunrise or lighting
before sunset
Sodium street-
lighting
v
Sunrise or Candlelight Red light 2,000
sunset
Using the ATW (Auto Tracing
White Balance) Function
The ATW function continuously adjusts the white
balance automatically to adapt to changes in lighting
conditions.
Note
Depending on the shooting conditions, automatic
adjustment may not necessarily give optimum results.
For the best possible results, use the W. BAL switch.
To use the ATW function
Press the ATW button turning the indicator on.
This activates the ATW function, and the ATW
indication appears in the viewfinder.
To disable the ATW function, press the ATW button
again, turning the indicator off.
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Chapter 5 Adjustments and Settings