Re: HIE in small cameras

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

On 19 May 99 at 16:36, Steve Michael Bohaty wrote:

> Hello all,
> 
> I'm a graduate student in geology, and I'm just finishing up my degree at
> the University of Nebraska (Lincoln, Nebraska).  For several years, I've
> messed around with black-and-white photography in my work and as a
> hobby.
> 
> I've been on the infrared list for a year or so, and I want to thank all
> the people who've posted their advice, knowledge, and experiences with
> infrared film.  I've been able to shoot many successful rolls of Kodak HIE
> (with only a few minor catastrophes).
> 
> Some time ago there was a thread discussing the use of HIE in
> small point-and-shoot cameras (indoor at parties, receptions, etc.). I
> believe someone mentioned placing an 87 wratten filter over the built-in
> flash and using DX-coded labels with cameras that don't allow manual
> setting of the film speed.

If you use a #87 gelatine: I don't think it will stand up to the
heat generated by the flash. Note that I say 'generated', not
'emitted'....apart from the heat that any flash emits, using an IR
filter means that the entire visible spectrum is absorbed by the
filter, and it can only do so by transforming it into heat.

Even my 0.4mm thick polyester #87C can't stand this abuse, and fades.
The 0.1mm #87 is fine though, it will buckle slightly under extreme heat 
(halogen torch light), but won't fade. 


--                 
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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