RE: Detail in IR highlights

[George L Smyth <glsmyth@xxxxxxxxx>]

--- "R. C. Lacovara" <lacovara@xxxxxxxxxxx> wrote:
> At 09:37 AM 10/6/00, you wrote:
> I've seen a variety of IR photographs, and there is sometimes a certain 
> "luminous" quality which could easily become blocked highs, and in some 
> cases, somewhat blurred edges in very bright objects. I've heard all sorts 
> of explanations for this, and like many things, 90% were purely hot air.
[snip]
> Instead, I will ask this: is it possible that the lack of anti-halation 
> coating provides a lot of the pearly, luminous quality of Kodak's film? 
> Someone who is familiar with Maco and Konica may be able to respond to 
> this. Maco has an anti-halation coating, but I don't know about Konica.

This is exactly the reason.  Light passes through the film, strikes the
backplate, and reexposes the film on its travel the other way.

Konica has an anti-halation layer and I have never gotten this effect in this
film.

Cheers -

george

=====
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