Archived posting to the Leica Users Group, 2000/09/26

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Subject: Re: [Leica] Leica Users digest V18 #39
From: Martin Howard <howard.390@osu.edu>
Date: Tue, 26 Sep 2000 16:59:08 -0400

B. D. Colen jotted down the following:

> No kidding - given all the various surfaces people suggest using to get an
> 18% gray reading, it must be possible to have a WIDE variation in surface
> coloration before you get a significant exposure difference....

Yeah, that would make sense if the dot was grey, but it's white -- meaning
it has very high reflectance.  Colours with very high reflective values are
all very close to white (look at a colour chart to see this).  So, by that
reasoning, the idea that if the white dot becomes coloured its reflectance
could be adversy affected is not such as mad one after all.

M.

- -- 
Martin Howard                     | It's not who you are, it's who they
Visiting Scholar, CSEL, OSU       | think you know that counts.
email: howard.390@osu.edu         |        -- Anonymous namedropper.
www: http://mvhoward.i.am/        +---------------------------------------