Re: [APML] Scanning slides (Was IC 410 uploaded and IC 405 adjusted)

["Stuart Heggie" <stuart.j.heggie@sympatico.ca>]

Alan, not trying to prolong this unnecessarily but the stars would keep showing up because even the
faint ones are brighter than the fainter parts of the nebulae. I think!
Stuart
----- Original Message -----
From: "Alan Voetsch" <alanv12952@yahoo.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Friday, November 05, 2004 12:07 PM
Subject: Re: [APML] Scanning slides (Was IC 410 uploaded and IC 405 adjusted)


> Stuart and Duncan,
>
> --- Stuart Heggie <stuart.j.heggie@sympatico.ca> wrote:
> > So, per you description below, the name for this is Reciprocity Law
> > Failure (or Reciprocity Failure
> > for short). If the system is slow enough, the crystals being formed
> > will keep decaying because of
> > insufficient photons in a short enough time to stabilize the
> > crystallization.
>
> That explains why faint areas are difficult for me to catch, but not
> why Supra will continue to show more and more stars even on exposures
> longer than 300 minutes.
>
> > Alan, I think your idea of a processing error might be right or maybe
> > others are push processing their film and you are not?
>
> Most likely it would  be an improper scan and I plan to post a question
> regarding that ASAP. I have always had my film developed by the
> recommeneded process, C-41 for Supra, E-6 (?) for the one roll of E200
> I've done. John's comment indicated that push processing wouldn't be
> needed unless it would help get the hump of the histogram fully into
> the box. Is pushing a good idea?
>
> Alan
>
>
>
> =====
> SCT Astrophotography: http://www.pbase.com/avoetsch/astrophotography
> FS-102 G-11/Gemini: http://www.pbase.com/avoetsch12952/tak_fs102
> & http://www.pbase.com/avoetsch12952/fs102
>
>
>
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