Re: Splitting 70mm film and different versions of Aerochrom

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 22 Jul 97 at 7:48, BIELECKJ@xxxxxxxxxxxxxxxxxxxx wrote:

> Kodak publication AS-69 (from their Aerial Film Section) lists Aerochrome 
> II 2443 as being available in 70mm X 100 foot lengths.  This is what we 
> have and it came perforated.  The rest of the listings for the three 2443 
> films Kodak currently produces are all in the 9.5" wide format.

I already have two different 70mm versions on my list, 'spool' and 
'vinten core'. Someone claimed that there was an unperforated 
version, could it be the latter?
 
> It should be noted that Aerochrome SO-134 and Aerochrome SO-060 are high 
> altitude films designed for photography at about 15,000 feet.  They do have 
> increased IR sensitivity when compared to the more garden variety 2443.

Don't have order numbers of those in my list yet....do you have
stock numbers for these two, in both 70mm and 9.5"? 

<pondering mode on>
Mmm....could it be that those emulsions are so IR-sensitive that the 
focus shift *does* become visible with anything else than 
apochromatic optics or small apertures?
This market should not have a problem with such high end optics,
which might be very good reason why these emulsions will never be
available for the consumer market. 
Does the data sheet cover the issue of focusing differently than for 
2443?


- -- 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
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End of Infrared-Digest V0 #147
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