VIVOTEK
56 - 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 fixed value is selected, system firmware
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 field will
apply when operating with the auto focus mechanism.
- Manual
: Select
Manual
to set a fixed 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 filter
setting will switch to
Day Mode
. If it was previously configured into other modes,
the previous setting remains intact.
Exposure control:
■
Exposure level
: You can manually set the Exposure level, which ranges from -2.0 to +2.0 (dark
to bright). You can also select other values from the Exposure mode menus and select a preferred
scenario or manually configure the associated settings. You may prefer a shorter shutter time to better
capture moving objects, while a faster shutter reduces light and needs to be compensated by electrical
brightness gains.
■
Exposure mode
:
Select
Auto, Shutter Priority, Iris Priority, Quality Priority,
or
Manual
mode according to your needs.
- Auto:
System default, which automatically adjusts the iris, shutter speed, and gain for an optimmal
exposure level.
Manual
:
(
Note that some of the Manual options will be disabled when WDR Pro is enabled!
)
Содержание SD8364E/ -M
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