William Robb wrote:
>
> ----- Original Message -----
> From: "Isaac Crawford
> Subject: Re: Pushing and Pulling film
>
> > Also, what about hypering and other tricks astrophoto people
> have been
> > using for years? I seem to recall a technique of letting the
> B&W film
> > absorb hydrogen peroxide fumes to boost the film speed. I
> can't recall
> > if it was done before or after the exposure...
>
> I have also heard about super cooling the emulsion in liquid
> hydrogen or some such for boosting speed. This sort of thing is
> done prior to exposure, and alters the basic emulsion chemistry.
> While certainly a useful technique for glass plate films, it is
> not really germain to the discussion at hand.
> William Robb
I dunno... I seem to recall being able to buy "hypered" film from
various telescope vendors... Granted, they were mostly doing it with
Tech pan and other slow fims, but I don't see why one couldn't do it for
faster ones as well...
Isaac
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