Re: Filters with Konica... need suggestions!

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

On  6 Aug 99 at 20:49, Luvdove6@xxxxxxx wrote:

> So all of those IR pictures are Konica with the R72?   It does look like 
> foliage is much whiter!!  I hear that there isn't enough light nm coming 
> through the 89B for Konica film...  is that true?  Let me know  ;-)  And you 
> said that R72 is the same as 89B....  so is that a Kodak brand wratten 
> filter.. the 89B??  

#89B is a code used in the Wratten system, named after the UK 
inventor and company Wratten, which was later bought by
the Kodak Inc. It's only a matter of convention to use this system, 
as it is the oldest system used.
To give you an idea of time frame:
I have an old Wratten catalog, printed in 1925, and the introduction 
mentions that Wratten has been recognized as the leading filter 
manufacturer for 10 years. 

Below a message once posted by Andrew Davidhazy, which indicates why 
it became part of Kodak at that time (Mr. Wratten was 86 years old by 
then):
 
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Date sent:        Wed, 29 Jan 1997 21:58:36 -0500 (EST)
From:             ANDPPH@xxxxxxxxxxxxxxxxxx
Subject:          FotoFacts - Wratten
To:               List for Photo/Imaging Educators - Professionals - Students
 <photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Originally to:    photoforum: ;
Send reply to:    photoforum@xxxxxxxxxxxxxxxxxxxxxx

              Wratten, Frederick Charles Luther (1840-1926)

English inventor and manufacturer. Founder in 1878 of one of the earliest
photographic supply businesses, Wratten and Wainwright, which produced and sold
collodion glass plates and gelatin dry plates. Invented in 1878 the "noodling" of
silver-bromide gelatin emulsions before washing. With the assistance of E.C.K Mees
produced the first panchromatic plates in England in 1906 and became a famous
manufacturer of photographic filters (Kodak photographic filters still bear his
name). Eastman Kodak purchased his company in 1912 as a condition of hiring Mees who
was relocated to Rochester.                             

... by M. Alinder in the Focal Encyclopedia of Photography
xxxxxxxxxxxxxxxxxxxxxxxxxxxx


All that said: on my homepage you can find an overview of IR-
and UV-filters, with spectral transmission data, and listing Wratten
as well as the equivalents of other companies (Schott, B+W, Heliopan,
Hoya and Cokin):

http://www.a1.nl/phomepag/markerink/mainpage.htm 
(or irfilter.htm directly)





--                 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


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