[APML] Fortepan B&W Film Test - No Good

["Don Westergren" <westergren@nethere.com>]

Hi All,

I have been collaborating with George Anderson to see if there is a film 
that can be used in place of the discontinued TechPan.  George sent me a 
roll of FortePan 200 and 400 film.  I exposed them to the same series as my 
color film tests to check for reciprocity out to 4-1/2 hours.  Both films 
were tested unhypered.

The FortePan has severe reciprocity, especially the 200 film.  I barely
could get a reading on the red at 4 minutes, and couldn't see anything at
longer exposures.  The 400 film also has severe reciprocity in 4 minutes,
but I was able to just get some extremely low readings out to 68 minutes. 
Neither
FortePan film looks viable as a stock film.

We will see if hypering helps.  If we find something that works, we will let 
you know.

Don


_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo