75
Iris Priority Mode
In this mode, it is the iris that has the premier priority in control of the
exposure. The value of iris is adjustable from F1.4 to F22 for Full HD
Ultra-WDR Speed Dome IP Camera and from F1.6 to F28 for 3M Speed
Dome IP Camera. The minimum shutter speed range is configurable
from 1/30 sec. to 1 sec. (NTSC) or 1/25 sec. to 1 sec. (PAL).
Manual Mode
In this mode, users can change the Shutter Speed, Iris, and Gain manually. The
shutter speed range is from 1/10000 sec. to 1 sec. (NTSC) or from 1/10000 sec.
to 1/1.5 sec. (PAL). The range of the iris size is from F1.4 to F22 for Full HD
Ultra-WDR Speed Dome IP Camera and from F1.6 to F28 for 3M Speed Dome
IP Camera. The gain value range is from 1dB to 15dB.
ExpComp
Users can define the value of Exposure Compensation; the value ranges from 1
to 15. The default value is 8. Click on <Set> to apply the setting.
2.4.2
White Balance
The White Balance setting can be found under this path:
Camera> White
Balance
.
A camera needs to find reference color temperature, which is a way of
measuring the quality of a light source, for calculating all the other colors. 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
following table shows the color temperature of some light sources for reference.
Light Sources
Color 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
Auto Mode
The Auto Balance White mode is suitable for environment with light source
having color temperature in the range roughly from 2700K to 7500K.
