Re: Problem with Wisner 4x5 camera probably solved!

[George L Smyth <GLSmyth@xxxxxxx>]

Jud Hofmann wrote:
> 
> >I am assuming that the makers of film holders chose their
> >materials a bit more reasonably.
> 
> If it emitted only in the infrared, they never would have detected it at
> that time.  It wouldn't be reasonable to test for it since IR film wasn't
> around then.  Just another way Mother Nature has of biting engineers &
> designers in the tail.

Not true.  As I've stated previously, the slides with five bumps, like
my Riteway holder have, indicate that they are IR opaque.  They
understood the problem posed by IR with the older wooden holders and
indicated so.  I've used mine for years without any fogging problems.

george

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

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