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Re: B+W 092 Filter Factor

  • From: "Willem-Jan Markerink" <w.j.markerink@xxxxx>
  • Subject: Re: B+W 092 Filter Factor
  • Date: Tue, 7 Sep 1999 20:28:17 +0100
On  6 Sep 99 at 15:29, Gdoces@xxxxxxx wrote:

> Does anyone know what the filter factor is when using the B+W #092 filter and
> Konica IR750 film??

#25 red is 8 ASA, #87 is 1 ASA, and I would rate #89B (092) closer to 
the first than to the latter, so that would be 4 ASA.

> Kodak HIE??

Same trick: #25 is 50 ASA, #87C is 12 ASA, so #89B is about 25 ASA.

 

--                 
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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