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000833_owner-lightwave-l _Thu Apr 27 17:58:47 1995.msg
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From: <ALANL%wpmail@sppd.stpaul.gov> (Alan J. Lloyd )
To: <LIGHTWAVE-L@netcom.com>
Subject: Re: Ambient Light Settings for daytime.
Date: Thu Apr 27 12:08:26 1995
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Brian Berg wrote:
> "I remember reading that for outdoor lighting,
> ambient light should have a certain percentage of
> blue (10%?) added to it...(deletia)...the sun should
> have a slightly yellow tint to it."
As primarily a shooter/lighter, I think I may have something
to add to this discussion. Your question is interesting and
complex. Lots of stuff to muse about.
This would depend not only on the atmospheric conditions
(overcast, clear, etc.) but on the time of day. Dawn and
dusk are closer to 3200K than the full daylight's 5600K.
This is due to the angle of the sun's rays, and the diffusion
of the blue and passage of red at sharper angles. (Physics
majors help here please!) High overcast daylight _can_ just
about go off the Kelvin scale...way above 5600K! I guess what
I'm getting at is that you should use whatever looks right and
fits the mood, rather than adhering to a hard and fast formula.
BTW, cameras can now do utterly amazing things with white
balance, I have balanced to high-pressure sodium (those orange
street lights, also used in gymnasiums, factories, etc.) and
it worked. I don't advise it for night street shooting though,
as I like a _small_ (25W) cam-top light and preset to 3200K,
the street lamps look their normal orange and skin tones look
"right" using that setup. (I've done several things, including
cop ride-alongs, this way!)
As above, use what _looks the best_ and fits the mood of the
piece.
-----------------------------------------------------------------------------
Alan Lloyd
alan.lloyd@stpaul.gov
>> All standard disclaimers apply. Non-standard disclaimers
available on request.
-----------------------------------------------------------------------------