RE: [APML] Sh2-240 and a Provia 100F Film Test

["Chris Schur" <cschur@cybertrails.com>]

Jon, thanks.  Film thickness is irrelevent with the schmidt film holder as
far as my shots show anyway.

Chris Schur

Astrophotography: http://www.psiaz.com/schur/astro/index.html


-----Original Message-----
From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
Behalf Of Jon Kolb
Sent: Friday, March 08, 2002 12:46 PM
To: astro-photo@seds.org
Subject: RE: [APML] Sh2-240 and a Provia 100F Film Test


Chris,

> Jon,  That fuji looks like it has very promising red
> sensitivity.  Im considering the E200 for my 8 inch schmidt.
> Do you think the contrast or red response is more suitable in
> the fuji?

100F seems very good in red, though not as good as E200 - nothing I've
tried picks up emission nebulosity like E200.  However, the Fuji grabs
blue a lot better than E200.  In something as fast as a Schmidt camera,
I think it's worth trying the 100F.  Heck, shoot both films - you've got
plenty of time in one night at that f-ratio.  There is only three
microns difference in the film thickness (127 vs. 130 for 35mm film), so
hopefully this won't affect your focus noticeably.

Sincerely,
Jon Kolb
Adventures in Astrophotography
http://home.datawest.net/jkolb/
jkolb@datawest.net




--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>


--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>