Re: Colorsync-users Digest, Vol 4, Issue 415
Re: Colorsync-users Digest, Vol 4, Issue 415
- Subject: Re: Colorsync-users Digest, Vol 4, Issue 415
- From: email@hidden
- Date: Tue, 20 Nov 2007 14:50:56 +1100
Roger,
I feel like I might be stating the obvious but as Newton demonstrated long ago all electromagnetic
radiaiton
and specifically light, not just UV, is refracted at different angles when passsing through a medium of
different density due to the varying wavelenghts. This applies, I would imagine, to our atmosphere,
strstosphere and all the other 'spheres' between us and space. It stands to reason that 'daylight'
will be different at diffetent times of the day, month and year as well as at different parts of the globe.
I use to assume that D50 would be defined as 'daylight' at Noon on the equator at the equinox or
something as relatively specific and unbiased. 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
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> Today's Topics:
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> 1. Re: Colorsync-users Digest, Vol 4, Issue 400 (Gerke, Debbie)
> 2. Re: Colorsync-users Digest, Vol 4, Issue 401 (Gerke, Debbie)
> 3. Re: Colorsync-users Digest, Vol 4, Issue 402 (Gerke, Debbie)
> 4. Re: Colorsync-users Digest, Vol 4, Issue 403 (Gerke, Debbie)
> 5. Re: Sunlight (Michel van Dijk)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 19 Nov 2007 08:05:01 -0600
> From: "Gerke, Debbie" <email@hidden>
> Subject: Re: Colorsync-users Digest, Vol 4, Issue 400
> To: <email@hidden>
> Message-ID: <C366F42D.162D%email@hidden>
> Content-Type: text/plain; charset="US-ASCII"
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> I will be out of the office from November 12-16. If you need
> immediate
> assistance please contact Patti Neilon at email@hidden. I will
> be
> back in the office on Monday, Nov. 19.
>
>
>
> ------------------------------
>
> Message: 2
> Date: Mon, 19 Nov 2007 08:05:01 -0600
> From: "Gerke, Debbie" <email@hidden>
> Subject: Re: Colorsync-users Digest, Vol 4, Issue 401
> To: <email@hidden>
> Message-ID: <C366F42D.162E%email@hidden>
> Content-Type: text/plain; charset="US-ASCII"
>
> I will be out of the office from November 12-16. If you need
> immediate
> assistance please contact Patti Neilon at email@hidden. I will
> be
> back in the office on Monday, Nov. 19.
>
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 19 Nov 2007 08:05:01 -0600
> From: "Gerke, Debbie" <email@hidden>
> Subject: Re: Colorsync-users Digest, Vol 4, Issue 402
> To: <email@hidden>
> Message-ID: <C366F42D.162F%email@hidden>
> Content-Type: text/plain; charset="US-ASCII"
>
> I will be out of the office from November 12-16. If you need
> immediate
> assistance please contact Patti Neilon at email@hidden. I will
> be
> back in the office on Monday, Nov. 19.
>
>
>
> ------------------------------
>
> Message: 4
> Date: Mon, 19 Nov 2007 08:05:01 -0600
> From: "Gerke, Debbie" <email@hidden>
> Subject: Re: Colorsync-users Digest, Vol 4, Issue 403
> To: <email@hidden>
> Message-ID: <C366F42D.1631%email@hidden>
> Content-Type: text/plain; charset="US-ASCII"
>
> I will be out of the office from November 12-16. If you need
> immediate
> assistance please contact Patti Neilon at email@hidden. I will
> be
> back in the office on Monday, Nov. 19.
>
>
>
> ------------------------------
>
> Message: 5
> Date: Mon, 19 Nov 2007 16:14:48 +0100
> From: Michel van Dijk <email@hidden>
> Subject: Re: Sunlight
> To: Apple Colorsync-user-list <email@hidden>
> Message-ID: <1195485287.8360.19.camel@localhost>
> Content-Type: text/plain
>
> Hello Roger,
>
> > Well, this idea that the amount of UV changes thoughout the season
> is
> > something new to me and worth investigating, as you noted, with
> NASA or
> > other public sources of sun's irradiance data on the internet.
>
> This is probably because sunlight travels through a thicker layer of
> atmosphere, when it is 'lower' than in summer. The more atmosphere
> light
> passes through, the more it filters out UV.
>
> Greets,
> Michel van Dijk
>
>
> --
> Midox Color
> www.midox.nl
> +31 (0)70 - 71 10 353
>
>
>
>
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> End of Colorsync-users Digest, Vol 4, Issue 415
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