Ikegami HDL-45E, Operation Manual

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5 - 2 5. OPERATION
5.2.2 Auto White Balance (AWB)
[White balance adjustment]
To create correct white balance images, it is necessary to perform white balance adjustment in accordance with the condition of
place in which the subject is located.
This condition is color temperature. It is determined by the light source for illuminating the subject.
Generally, the distribution of color temperatures are as shown in the table below.
After sunrise / Before sunset Day light
Sunrise
/
Sunset
Natural
light
Artificial
light
20 minutes 30 minutes
45 minutes
1 hours 2 hours
Clear
Slight cloudy
Cloudy
Incandescence
Candle - light
Reflector lamp for photo
Strobo / Fluorescent lamp
2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500
8000 9000
8500 10000 K
Halogen lamp
The human eye adapts to a changing environment--the color balance for it will not be disturbed seriously even if color
temperature varies according to the environmental conditions and stored data. The camera, on the other hand, has no such
adaptability--a change in color temperature results in a change in color balance.
This camera, however, switches over color filters in accordance with lighting conditions of the subject.
Electric color temperature (ECC) filters are used and ECC; 3200K/5600K switch over is automatically performed. With this, all
the operator has to do is to operate the AWB switch in order to cover the full range of color temperature without regard to the
relationship between the subject and the color temperature filters.
[Adjustment procedure]
*Place a piece of white paper or a white cloth in front of the subject, and zoom in on it so that it occupies more than 1/5 of the
entire image.
(Be sure that there is no other subject brighter than the piece of white paper or cloth on the image.)
*Set the switch to the AWB position.
*The AWB/ABB indicator lights in green while auto white balance is performed. It turns off upon completion of auto white
balance adjustment.
When the AWB/ABB indicator blinks, check if the shooting conditions for the subject are proper and perform the AWB again.
5.2.3 Auto Iris Control
The quality of images can be further enhanced by changing the setting of the IRIS mode selector switch on the remote control
panel (RCP-50B) in accordance with the condition of the subject while monitoring the image displayed on the HDTV monitor.
Pressing the auto iris switch on the remote control panel (RCP-50B) causes the lens to enter the auto iris mode in which the
optimum iris value is automatically selected according to the brightness of the subject.
CAUTION
Verify that the iris operation select switch of the lens is set to the
auto position.