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VIVOTEK
54 - User's Manual
- Shutter Priority: When selected, the Exposure time slide bar will appear, allowing you to select an
exposure time ranging from 1/10,000, to 1/1 second. Once a xed value is selected, system rmware
will automatically tune the gain and iris settings to match an optimal exposure level.
- Iris Priority: When selected, the Iris adjustment slide bar will appear, allowing you to select
an aperture size ranging from F14 to F1.6. Once a fixed value is selected, system firmware will
automatically tune the gain and exposure time to match an optimal exposure level.
The value is
measured in the F-number as the ratio of the focal length to the lens diameter. Iris size is inversely
proportional to the F-number; therefore, the smaller the F-number, the greater is the exposure ratio.
Smaller F-number (larger exposure ratio, largest size of lens aperture opening) is shown on the right of
the slide bar.
- Quality Priority: When selected, the embedded mapping table of aperture size and depth of eld will
apply when operating with the auto focus mechanism.
- Manual: Select Manual to set a xed exposure time, iris, and gain. Then, tune the slide bar to set the
Exposure time, Iris adjustment, and Gain Control to the best image quality. A shorter exposure time
allows less amount of light to enter the sensor; while a higher gain control value generates certain
amount of noises.
Note the following when the Manual mode is selected:
1. The Exposure level bar will not be available.
2. The IR cut lter setting will switch to Day Mode. If it was previously congured into other modes,
the previous setting remains intact.