Re: [APML] Tech Pan 120 Hypering, Kodak Response.

[George Anderson <georgea@cam.org>]

Thanks Chuck

I realize that unhypered TP is probably one of the worst films to use
for AP. I am looking for some examples that I can send to Pete and
others at Kodak "just in case" they don't grasp the effect that hypering
has on a film which their tech pub states "You can use these films for
stellar photography, but first hypersensitize them with forming gas".
I am in the final stages of setting up my hypering system and although I
am not shooting 120 format, I do have access to a Hassey that I would
like to try some widefield with someday.
Kodak had a similar problem in the past as a result of process
improvement. I run into the same problem at work almost everyday when a
process improvement based on cost is implemented on our product
(airborne magnetometers with a 0.001 gamma sensitivity) without checking
with us on the potential impact.
So I will write and contact Kodak and fully expect a response along the
lines of "Your concerns have been duly noted and will be forwared to our
technical film department for their analysis and evaluation".

George Anderson
Montreal Canada

Clear skies and good health


Chuck Vaughn wrote:
> 
> George,
> 
> Many years ago I accidently shot some unhypered TP. I shot 1 hour at
> f4.5 with an H-a filter centered on Gamma cygni. It recorded perhaps
> 100 stars and no nebulosity. It looked like a 1 minute exposure on
> hypered TP. :-)
> 
> Chuck
> 
> ------------------------------
> 
> > Does anyone on the list have an example(s) showing the same section of
> > sky shot on hypered and un-hypered tech pan with the same exposure? Or
> > even boxed film tests (Don and Robert) showing the difference between
> > hypered and un-hypered tech pan.
> >
> > George Anderson
> > Montreal Canada
> >
> > Clear skies and good health
> 
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