[APML] RE: Enhanced Sky Glow or Enhanced Film Sensitivity?

["Richard Klappal" <klappal@xnet.com>]

Glad to help out ...
	I'm still trying to digest the paper.  It's practically all tables; I'm
more used to plots, but they weren't as easy to publish 90 years ago!

-----Original Message-----
From: Todd Leen [mailto:tleen@cse.ogi.edu]
Sent: Sunday, 16 November 2003 17:22
To: astro-photo@seds.org; klappal@xnet.com
Subject: Re: Enhanced Sky Glow or Enhanced Film Sensitivity?


Richard,

Thanks for the reference!

Todd

> From: "Richard Klappal" <klappal@xnet.com>
> Subject: RE: [APML] Enhanced Sky Glow or Enhanced Film Sensitivity?
>
> Message: 7
>
> At 25F, he could be experiencing the benefits of a "natural" cold-camera
> setup. Covington's first edition of "Astrophotography for the Amateur"
notes
> significant improvements at 32F.
>
> King's original work on cold cameras is avail in the Harvard archives
> (http://adsabs.harvard.edu/abstract_service.html) ...
>         Title:  Lunar photometry and photographic sensitiveness at
different
> temperatures
>         Authors:        King, Edward S.
>         Journal:        Annals of Harvard College Observatory, vol. 59,
pp.63-94
>         Publication Date:       00/1912
>         Origin: ADS
>         Bibliographic Code:     1912AnHar..59...63K
>
> -----Original Message-----
> From: astro-photo-bounces@seds.org
> [mailto:astro-photo-bounces@seds.org]On Behalf Of Stuart Heggie
> Sent: Friday, 14 November 2003 06:04
> To: Discussion of Film Astrophotography
> Subject: Re: [APML] Enhanced Sky Glow or Enhanced Film Sensitivity?
>
> I would think that from Oregon it would be reasonable to consider the
aurora
> as a culprit. Was there a specific colour you found in the excessive
> sky-glow? Red would support the aurora theory.
>
> Stuart
> ----- Original Message -----
> From: "Todd Leen" <tleen@cse.ogi.edu>
> To: <astro-photo@seds.org>
> Cc: "tleen" <tleen@cse.ogi.edu>
> Sent: Friday, November 14, 2003 1:02 AM
> Subject: [APML] Enhanced Sky Glow or Enhanced Film Sensitivity?
>
> > Folks,
> >
> > My prime focus shots from the October
> > new moon (using my usual rig, site, and
> > exposure times) are way past the sky-fog
> > limit.  Was this enhanced sky glow
> > from the recent solar activity, or
> > enhanced film sensitivity because
> > the temperature dipped down to 25F
> > during the imaging session.




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