Sony DXC-D30WSP service manual White Balance Adjustment, Light Sources and Color Temperature

DXC-D30WS/P(E)/V1

White Balance Adjustment

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.

Notes

•When using a camera control unit, if the W/B BALANCE switch of the camera control unit is set to PRESET or MANUAL, it is not possible to carry out white balance adjustment on the camera.

•When using a CCU-M5/M5P Camera Control Unit, make sure that the MODE switch of the CCU-M5/ M5P is in the CAM position.

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

AUTO WHITE

-NG-

:C.TEMP.LOW

CHG.FILTER TRY AGAIN

AUTO WHITE

-NG-

:C.TEMP.HI

CHG.FILTER TRY AGAIN

The color temperature is too low. Try the following, in this order of precedence.

(1)If the FILTER control is in position 2, 3 or 4, change it to position 1, then 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 the following, in this order of precedence.

(1)	If the FILTER control is in position 1,
	change it to position 2, 3 or 4, then
	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

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

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.

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.

WHITE:PRESET

BARS

conversion filter, then retry the

adjustment.

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 signal.

Move the OUTPUT/DL/DCC+ switch to one of the CAM positions.

Light source

Natural	Artificial
Clear sky
Light cloud
Cloudy or rainy
skies
	Fluorescent light
	(daylight white)
Direct sunlight,	Mercury lighting
noon	Fluorescent light

Color temperature (K)

>10,000

8,000

Blue light 7,000

>6,000

5,000

.

White light

If the ATW function does not operate correctly

A warning massage appears in the viewfinder as shown in the table below.

Message	Meaning and corrections to be made
:C.TEMP.LOW	If the FILTER control is in position 2, 3 or
	4, change it to position 1, then retry the
	ATW operation.
:C.TEMP.HIGH	If the FILTER control is in position 1,
	change it to position 2, 3 or 4, then retry
	the ATW operation.

Chapter 5 Adjustments and Settings

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.

Using the Preset White Balance Settings

The camera provides two preset white balance settings, for instant shooting with approximately the correct adjustment.

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 3200 K when the FILTER control is in position 1 or 2, and for 5600 K in position 3 or 4.

	(white)
One hour after
sunrise or	Fluorescent light
before sunset
	(warm white)
	Studio lighting
	Halogen lamps
	and video lights
Thirty minutes	Incandescent
after sunrise or	lighting
before sunset	Sodium street-
	lighting
Sunrise or	Candlelight
sunset

>
	4,000
	3,500
	3,200
Yellow light	3,000
>	2,500
.
Red light	2,000

Chapter 5 Adjustments and Settings

72 Chapter 5 Adjustments and Settings Chapter 5 Adjustments and Settings 73

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