Re: Sunlight
Re: Sunlight
- Subject: Re: Sunlight
- From: Roger Breton <email@hidden>
- Date: Mon, 19 Nov 2007 23:09:22 -0500
> However, I have since been informed by someone
> better educated than myself i these matters that it actually corresponds to
> noon at a particular place
> (where someone first decided to measure and specify it?!) in North America.
> The name of the place
> escapes me but it did seem a bit arbitrary.
>
> Mark Stegman
Yes, the litterature I have says that it was measured in North America in
Washington DC, Rochester NY and Ottawa, Canada, if I'm not mistaking. Maybe
northern Europe too? I'm not 100% sure. But it looks like those were places
where some of the CIE color scientists working on the project can be found!
But I fail to remember or actually never thought about the seasons I which
these measurements were carried out. I thought, naively perhaps, that D50 is
D50, irregardless of the time of the year but I realize know 'there's more
than meets the eye' with this business of D50. I'll try to find further data
and let you know if I come across something meaningful.
Thank's for your help!
Roger Breton
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