Re: Questions RE: Old, poorly stored film & B+W filter's IR

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 30 Jul 96 at 22:43, George L Smyth wrote:

> Willem-Jan Markerink wrote:
> >
> > Serious, I recently also got a numerical brochure for Schott glass
> > filters, so I could list a similar range of filter spectra as is
> > currently available for Wratten (the chapter originally typed in by
> > Andrew Molitor).
> > Are there more people interested than just me? Or is this a tough
> > typing exercise in vain?....;-))
> > 
> 
> Please do post.  Somewhere along the line I'll be putting together a
> graphical representation of filter information, so that we can better
> understand what each filter actually does (it'd be easier for me to
> visualize than the numbers).

Forgot to mention: I *do* have graphical transmission charts of
almost all filters. Actually, I had those charts *before* I got the
numerical data. Andrew Molitor's Wratten IR data was the first I saw,
but I already had charts from B+W. Later on I got a complete
overview of Schott charts, and found old Wratten charts in a Kodak
catalogue from 1928. Just recently this was completed with Schott
numerical data. The only thing I don't have is charts from the
Wratten 87 series, and some versions of 70, 88 and 89; they are not
listed in this old catalogue.

Anyone having a recent Kodak Scientific handbook surplus?....;-))
(I assume it contains charts *and* numerical data, right?)

BTW, I might have mentioned this before: I am always interested in old 
brochures and catalogues about IR; I currently have the Kodak 
databook "infrared and ultraviolet photography", 1947 Second Edition 
and 1952 Fourth Edition. Would be nice to collect some more odds and 
ends in the history of IR....:-))



--
Bye,

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The difference 
between men and boys
is the price of their toys

<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 2