RE: [APML] Sierra Star Trails Question

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

Allan, Id do a check of the Kp index for that night, and see if it exceeds 5
or so.  That would cause the airglow you are seeng to be enhanced.  It could
also of coarse be a shift in film sensitivity centered on the lenses
vignette.

Chris

-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of Allan & Julie Whetzel
Sent: Monday, August 22, 2005 10:11 PM
To: Discussion of Film Astrophotography
Subject: [APML] Sierra Star Trails Question


Hello -

I was in the Sierra Nevada the week of August 8th and took these star
trail images. Was at 11,000 feet - a nice dark site. The first image
was about an hour long exposure and the second about an hour and a
half. Taken on Fuji 100ASA Superia Print Film. The heavy green
response in the images was a surprise to me - kind of cool in an odd
way. I'm curious if others have seen this same effect. Any comments
are welcome!

Thanks,

Allan


http://www.members.cox.net/whetzel/Trails0.jpg
http://www.members.cox.net/whetzel/Trails2.jpg
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