Motorola Avigilon H5A-FE Series User Manual page 22

Exposure Offset: This is an advanced setting that allows you to compensate for unusual
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lighting conditions by setting an exposure offset value. Negative values result in a persistently
darker image, and positive values result in a persistently brighter image.
Maximum Exposure: You can limit the automatic exposure setting by selecting a maximum
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exposure level. The Maximum Exposure drop-down list is only available when the Exposure
setting is set to Automatic.
By setting a maximum exposure level for low-light situations, you can control the camera's
exposure time to let in the maximum amount of light without creating blurry images.
Priority: You can set Max Image Rate or Exposure as the priority.
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When set to Max Image Rate, the camera will maintain the set image rate as the priority
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and will not adjust the exposure beyond what can be recorded for the set image rate.
When set to Exposure the camera will maintain the exposure setting as the priority, and
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will override the set image rate to achieve the best image possible.
Maximum Iris: You can limit the largest iris opening the lens will use by setting a maximum iris
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opening. This value is an f-number. It is also given in EV relative to the widest possible opening
of the lens. This setting is only available when the Iris setting is set to Automatic.
The iris opening also affects how much of the scene is in focus. The smallest f-number (0 EV)
sets the iris to the widest possible opening. This allows the most light into the camera, but
places less of the scene in focus. Larger f-numbers (negative EV) result in a smaller maximum
opening, placing more of the scene in focus. The camera will automatically correct for the
decreased light by using a higher gain or a longer exposure time.
Preferred Iris: You can set an ideal iris opening to give a well-exposed and well-focused image
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in the most frequent lighting conditions. This value is an f-number. It is also given in EV relative
to the widest possible opening of the lens. This setting is only available when the Iris setting is
set to Automatic.
Note: The Preferred Iris value must be less than or the same as the Maximum Iris value.
The smallest f-number (0 EV) sets the iris to the widest possible opening. This allows the most
light into the camera, but places less of the scene in focus. Larger f-numbers (negative EV)
result in smaller openings, placing more of the scene in focus. The camera will automatically
correct for the decreased light by using a higher gain or a longer exposure time.
Backlight Compensation: If your scene has areas of intense light that cause the overall image
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to be too dark, change the Backlight Compensation value until you achieve a well-exposed
image.
Iris: You can allow the camera to control the iris by selecting Automatic, or you can manually
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set it to Open or Closed.
Maximum Gain: You can limit the automatic gain setting by selecting a maximum gain level.
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By setting the maximum gain level for low-light situations, you can maximize the detail of an
image without creating excessive noise in the images.
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