Picky, picky picky. :)
At 06:59 AM 1/18/2002 -0800, you wrote:
>Hi Peter,
>
>No, you changed that to "almost exactly", which I saw after my post <g>.
>
>Anyway, I found the article where I read the assertion, and am looking
>into the matter now. Maybe we can get this clarified a bit.
>
>Also, I put up a page of filter factors for Kodak B&W film, but it
>didn't contain information on the chromogenics. In the article from
>Kodak that you quoted
>
>http://www.kodak.com/cluster/global/en/consumer/products/techInfo/f15/index.shtml#49741
>
>There was a table of filter factors for KODAK Black & White + 400 Film.
>I've not yet compared that to the other B&W emulsions that are listed on
>my site, but I will later today. Perhaps that might shed a little more
>light on the subject. If you, or anyone else would like to make the
>comparison, here are the URLs:
>
>http://home.earthlink.net/~belinkoff/cameras/filterfactors.html
>
>and
>
>http://home.earthlink.net/~belinkoff/cameras/kodak-c41-bw.html
>
>Peter Alling wrote:
> >
> > I guess you didn't see my correction, I changed that to "almost the same".
> >
> > I agree that there is a question of the way the technology is applied.
> > If the film has a single photo sensitive layer, as I assume is true to most
> > conventional b&w films are then the response of the film to filtration
> > would depend on a single color response curve, (I don't know if that
> > terminology
> > is correct but there is such a curve describing the emulsions sensitivity
> > to various
> > wavelengths). In that respect chromogenic b&w film would really be no
> > different
> > from any other B&W film, each different emulsion will respond a bit
> > differently
> > within a general range. If for some reason the film has
> > multiple photo sensitive layers as in a conventional color film then the
> > results will be a bit more complicated. Then you would have to take into
> > account the color response curves of each layer, but even then I could
> assume
> > that changing the color balance of the light would have a similar
> effect on how
> > those colors were rendered in grey scale. I can't imagine that other
> > manufacturers have uncovered a secret to change that fact.
>
>--
>Shel Belinkoff
>mailto:[EMAIL PROTECTED]
>http://home.earthlink.net/~belinkoff/
>-
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