Canon VB-C500D Operation Manual page 110

Performing Operations and Settings as the Administrator
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The white balance is fixed to that of the video currently received.
To forcibly fix the white balance according to the light source, use [One-shot WB].
Example of setting method:
Irradiate a white subject (white paper, etc.) using the light source and capture the subject
over the entire screen. In this condition, select [One-shot WB].
Note
Since the light source selection options are based on representative characteristics, proper
colors may not be achieved depending on the applicable light source. In this case, use the
[One-shot WB] function.
If the image looks greenish under mercury lamps in the [Auto] mode, select the [Mercury
Lamp] mode under Light Source. If the image is still not shown in appropriate colors under
mercury lamps when the [Mercury Lamp] mode is selected under Light Source, use the
[Auto] mode.
Notes on capturing video continuously day and night
If a subject that seldom changes is captured in a location where the light source changes
gradually, such as when capturing such subject continuously day and night, the image
may not be shown in appropriate colors.
When the subject has only one color or when sodium lamps, mercury lamps and certain
other fluorescent lightings are used, camera colors may not be adjusted automatically.
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