Re: B+W IR Filters

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

On  7 Aug 96 at 19:41, N. Remi Shih wrote:

> Just flipper over B&H catalog and find that B+W mades several IR filters.
> Question is that their filter numbers are not in any readable
> (understanding) form.  Anyone knows the trick?  Convertion table like this
> will be veru helpful.. 
> 
> B+W     Readable form    Cut off
> ---    ---------------  ---------
> 092        25A?           600 nm?
> 093        ?              ?
> 094        ?              ?
> 099        ?              ?
> 489        ?              ?

Apart from 489 (is a UV/short pass filter), the transmission data (0%
and 50%) of the entire B+W, Heliopan and Schott IR range, including
a few more yellow/orange colors for Ektachrome IR, and a Wratten
conversion can be found on my homepage:

http://www.a1.nl/phomepag/markerink/mainpage.htm

I do have the full Schott glass transmission data and charts at hand, 
but have not had time to type or scan either yet. But the current 
info on my homepage will probably answer all your questions.
--
Bye,

       _/      _/       _/_/_/_/_/       _/_/_/_/_/
     _/  _/  _/               _/       _/  _/  _/
     _/  _/ illem    _/     _/ an    _/  _/  _/ arkerink
                     _/_/_/  


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

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

------------------------------

Topic No. 9