Re: [APML]: film speeds (here we go again)

["Bobby Middleton" <bobbym@unicomp.net>]

The Astro-Photography Mailing List
------------------------------------

PPF 400 is well thought of for it's resolution & grain. Same for
Ektachrome Ell 100. Another factor is repricicoty failure. After
longer exposures, some of the slower films actually end up
being faster than some high speed films 
due to their excellent repricocity traits.
Hypering will help in the color balance of the film and will also
still give some speed gains.

 

Bobby Middleton

astropics at: http://home.unicomp.net/~bobbym/astro1.htm


----------
> From: Frank Schwartz 
> ------------------------------------
> 
> I posed a question a short while back, and lost my email feed to this
list.
> I'm not sure if I worded the question quite like this, but here goes:
> I am a beginner in astrophotography, and have been looking at a lot of
web
> sites.  Just curious- why do some use such a slow speed film like 100 or
> 400?    Also, why hyper it?  wouldn't  400 or 800 speed film have the
same
> effect?