On Friday, December 14, 2001 at 19:17, John A. Lind
<olympus@xxxxxxxxxxxxxxx>
wrote re "Re: [OM] A trying test: One failure" saying:
...
> Color balancing fluorescent light is much more difficult than incandescent
> (tungsten) because it isn't just a "roll-off" in a region of the visible
> spectrum. Fluorescent and most other gas discharge type lighting (mercury
> vapor, sodium vapor, etc.) have significant spikes of specific wavelengths.
>
> Worse yet is mixed lighting that has lighting sources of different
> types. Color balancing those situations can be nightmarish, often
> impossible. Look at what you shot to see if there's a possiblity of mixed
> lighting in them (daylight coming through windows, stage with tungsten based
> lighting, etc.).
Thats why movie makers have huge rolls of filters they put over windows,
etc., to balance the colour temperature. Useful for photographers, too, but
pricey & needs deployment.
Tom
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