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

[George L Smyth <GLSmyth@xxxxxxx>]

Cor Breukel wrote:
> 
> On Tue, 30 Jul 1996, Adam-HALPID Klyce wrote:
>
> >      "In general, the sensitivity of black and white infrared film is
> >      about ISO 50/18-degrees. Kodak infrared film and the B+W filter
> 
> ..sounds like gross overexposure to me: I shoot at 250 ASA, using through
> the lens metering through a dark red (+3 stops) filter, and you can start
> with even higher speeds.....
> 

Of course, this depends upon how he's metering.  If he's not metering
through the filter (2 stops) then he's within 1/3 stop of EI250.  Even
if he is metering through the filter, appropriate development can
compensate without a problem.  Through the tests I'e performed, I've
found that HEI can appear finely grained when "overexposed" (in this
portion of my tests, I exposed at EI64).  Exposure at EI1000 results in
low contrast, high grain images.  I love the versitility of this film.

george

-- 
 Handmade Photographic Images     
  http://www2.ari.net/glsmyth

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Topic No. 12