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User’s Manual
24
22×/23× Model:
• AUTO
In this mode, the camera’s shutter, IRIS and AGC control functions work
together automatically to adjust the light exposure of the image sensor in
order to obtain a consistent video output level. IRIS OFF SET is used to set
the level of IRIS variation.
• SHUTTER
This option means that the SHUTTER setting takes priority over IRIS and
AGC; the IRIS and AGC circuits will function automatically in conjunction with
the set shutter speed to obtain a consistent exposure.
• IRIS
This option means that the IRIS setting takes priority over SHUTTER and
AGC; the SHUTTER and AGC circuits will function automatically in
conjunction with the IRIS setting to obtain a consistent exposure. If the IRIS
setting is modified manually, exposure compensation depends on the AGC
circuit.
• AGC
This option means that the AGC setting takes priority over SHUTTER and
IRIS; the SHUTTER and IRIS circuits will function automatically in conjunction
with the AGC setting to obtain a consistent exposure. If the AGC setting is
modified manually, exposure compensation depends on changing the IRIS
setting.
3.3.6 WBC MODE
A digital camera needs to find a reference colour temperature, which is a way of
measuring the quality of a light source, in order to correctly calculate all the other
colours. The unit for measuring this ratio is degrees Kelvin (K). You can select one of
the white balance control modes depending on the conditions. The following table
shows the colour temperature of some light sources.
Light source Colour temperature in K
Cloudy sky 6,000 to 8,000
Noon sun and clear sky 6,500
Household lighting 2,500 to 3,000
75 watt bulb 2,820
Candle flame 1,200 to 1,500