Re[2]: Infrared Fireworks Photographs

["Peter Badcock"<pbadcock@xxxxxxxxxxxxxxx>]

Dear George, Mike and others,
                                I believe that the cause of the halo is due to 
the fact that Kodak's HIE has no anti-halation layer on the film.  Since said a 
'Major Burst', this would imply that it is brighter than the average burst 
(which wouldn't show up the Halo as distinctly).  I suspect that you would get 
exactly the same effect if you photographed any bright light source using HIE 
(e.g. the sun, or a light bulb).

This effect is one of the attractions of HIE.  Konica's IR film, and practically
all B&W emulsions today, have an anti-halation layer so you don't get this 
effect.

regards
Peter



______________________________ Reply Separator _________________________________
Subject: Re: Infrared Fireworks Photographs
Author:  <infrared@xxxxx> at INTERNET
Date:    05/7/98 17:27
Baseball game, where the foliage in the background showed the Wood Effect.

> One phenomenon was noted though...on two/three of the images there looks like 
> a secondary light ring around a major burst.  Anyone have an idea what would 
> cause such a circular halo around the major bursts on the image?

I got that also and would like to hear input too.  I sent the image to a number 
of people who were on my postcard list (see my Web page) because I liked the 
effect so much.

george


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