RE: [APML] Ara Nebula - Eat your heart out!

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

Wade, I think your right.  I had to extract quite a bit of red from the
stars in this image too.  The film is 2 years old.

Chris

-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of Thomas W. Earle
Sent: Sunday, July 17, 2005 12:28 AM
To: 'Discussion of Film Astrophotography'
Subject: RE: [APML] Ara Nebula - Eat your heart out!


Chris,

I always enjoy your Schmidt Camera shots.  I've always been a sucker
for wide-field shots.  Analyzing your last several images, it seems
the Kodak Supra 400 is on its last leg.  How old is it?  Generally
speaking, negatives offer tighter stars; however, as a film ages its
perceived grain size increases thereby resulting in larger stars.
I'd be willing to bet that the stars you experience now would be no
larger with E200.  Fresh E200 would make for some phenomenal Schmidt
Camera shots given its sensitivity to H-alpha.  I've also been
experimenting with Provia 100F pushed 1-stop.  At my dark site, it
gives excellent results; however, I have noticed a slight yellow
casts which is easily removed in Photoshop.  I'll be posting a Rho
Ophiuchi shot using Provia 100F by the end of the month.  Provia
100F will produce even "tighter" stars than E200.  I believe your
imaging will benefit greatly by switching to a newer film.

As always, I look forward to your next wide-field image(s).

Wade


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