Re: [APML] Rescan of 2002 Aurora from Cherry Springs

["Chris Cook" <ccjd@ix.netcom.com>]

Jeff -
Those rescans are great.  Much more detail in the shadow areas.
Are the slides dark to begin with?


Chris

----------------------------------
Chris Cook
Astronomical & Nightscape Photography
www.abmedia.com/astro


-----Original Message-----
From: Jeff Ball <jeffball@zoominternet.net>
To: Discussion of Film Astrophotography <astro-photo@seds.org>
Date: Thursday, March 20, 2003 9:03 AM
Subject: [APML] Rescan of 2002 Aurora from Cherry Springs


>Hello all,
>I am working on an animation of this aurora and rescanned with the Nikon
>Coolscan 8000 ED.  I was blown away with the rescans.  Not that they are
>tremendous aurora shots, it is just that the Nikon really captured the
>detail on the slide.  I did not realize how much the Polaroid 35 plus did
>not pick up.  It may be a case of me not understanding how to use the
>Polaroid.  I no longer have that scanner.  My only guess is that I
increased
>the analog gain on the Nikon by a factor of 1 to move the black point on
the
>histogram further to the right.  I don't think I had this capability with
>the Polaroid.  I can't remember the amount of control I had over a Polaroid
>scan.  I think I used some form of a European software for the Polaroid,
but
>it wasn't the packaged software with the scanner.  I loved the Polaroid and
>have rarely seen the Nikon beat it out.  But with these slides, the analog
>gain adjustment seems to really make a difference.  I realize that when it
>comes to scanning, I still don't know what I am doing.
>
>Here is the new version.
>
>http://www.astro-photography.com/bfsp_aurora_nikon.htm
>
>here is the Polaroid version.
>
>http://www.astro-photography.com/bfsp_aurora.htm
>
>The colors in the Nikon are more like the slide.  I don't know what
>enhancements I did with the Polaroid.  With the Nikon, I did not use Nikon
>color management and only stretched curves a bit and set the black point
for
>all colors.  I put a little G-blur to smooth out selected dim areas.  I
>thought it was pretty interesting.  I hope to have an animation soon.  I
>only have 4 frames to work with, but it may still be interesting.  Best
>regards.
>
>Jeff Ball
>www.astro-photography.com
>
>_______________________________________________
>Astro-Photo mailing list
>Astro-Photo@seds.org
>http://seds.org/mailman/listinfo/astro-photo
>

_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo