Iris Priority
In this mode, the iris opening has the highest priority in exposure control. Iris opening values
range from F1.6 to F28. The lower the number, the more light is let into the lens.
Manual
In this mode, the shutter speed [1/10000 to 1], iris opening [F1.6 to F28], and gain [1 to 15]
settings can be specified manually.
8.9
Camera - WB
PTZ > Camera - WB
Colour temperature
A camera needs to measure the quality of a light source and create a reference colour
temperature in order to calculate all the other colours. The unit for measuring this ratio is in
degree Kelvin (K). Users can select one of the White Balance control modes, according to the
operating environment. The table below gives the colour temperatures of some light sources
as a general reference.
Light source
Colour temperature in °K
Cloudy sky
6000 to 8000
Noon sun and clear sky
6500
Household lighting
2500 to 3000
75 W bulb
2820
Candle flame
1200 to 1500
PTZ&IMAGE
87