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Posted by Bill Farnsworth on 07/03/06 20:30
"Richard Crowley" <rcrowley@xpr7t.net> wrote
> "Bill Farnsworth" wrote ...
>> In some areas streetlights on minor roads, parking lots and
>> pedestrian walkways are now being converted over to full spectrum
>> 3200 LEDs.
>
> The astronomers must hate that. So much for the International Dark
> Sky Association
> http://www.darksky.org/
> They loved sodium vapor, et.al. because the terrestrial
> light pollution could be so easily filtered out.
First off, as I and several others have said, Paul's video looks damn
fine as it.
But I had a bit more of a "think" on this one.
What's wrong with it.
Nothing. The street lights came out just as we see them. A bit orange.
And if there are any Mercury Vaps then they would be green........
just as we see them.
However, what is not being seen as natural (natural for Sodium Vap
light, that is) is the sky and shadows are not black. They are
slightly orange.
IRL we see the orange (or green) light. But.......... for all intents
and purposes, we also see the night sky as black.
Now, throw away the black balance issue for a bit and think about
this....
When you are shooting under street lights or with street lights in the
shot, you will have a lens flare issue. Especially a dusty lens or
filter. And that flare well lighten the image a bit off to the range
of the color temp of the offending light(s).
With me so far?
So along with everything else that has been suggested make sure the
lens and filters are dust free.
Use a larger lens shade.
And ......... toss a polarizer on that puppy and dial it in a wee bit
to see what you get.
Bill F.
www.billfarnsworthvideo.com
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