RE: Kodak HIE film in a 120 format?

[Theo Benson <TBenson@xxxxxxxxxxxxx>]

No, I'm not wrong.You're playing a semantics game. Almost all films could be
considered IR film if the only requirement was a slight sensitivity beyond
red. Yes, Konica peaks at around 700nm, and though it extends further, it's
pretty "numb" by the time you get to 800nm. A film whose sensitivity
diminishes severely at the edge of my filter's cutoff is pretty much useless
to me. Of course neither the filter nor the film range stops dead at a
certain point -- they're both continui -- but both have pretty steep curves
as they approach each other.  [Theo Benson]  Even Konica eventually admitted
to me that their IR film wasn't really. If it was, then how could you load
35mm canisters in the same subdued light that obliterates Kodak HIE?
- ----Original Message-----
> From:	George L Smyth [SMTP:GLSmyth@xxxxxxx]
> Sent:	Friday, July 31, 1998 2:05 PM
> To:	infrared@xxxxx
> Subject:	Re: Kodak HIE film in a 120 format?
> 
> Theo Benson wrote:
> > 
> > Because, as I've said, Konica isn't really infrared film. It stops at
> 700nm,
> > and I am interested in 900nm. If you stick a #87C filter on your camera,
> and
> > shoot Konica "IR" you will get a whole roll of unexposed film.
> 
> Wrong.  Konica certainly is an infrared film, as it extends just beyond
> 800nm. 
> Its peak is at 720nm.  An 87C would be right at the edge of Konica's
> range, so
> theoretically it could work under strong sunny conditions.
> 
> george
> 
> -- 
> 
> Handmade Photographic Images
> http://www2.ari.net/glsmyth/
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End of Infrared-Digest V0 #718
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