Re: [APML] Gegenschein - possible scanner challenge

[`Cuda <rgabbert@mgfairfax.rr.com>]

Tom and Lou:

I have a Nikon LS-2000 scanner that works pretty good.  I'm no pro, but will
try.  Also, if anyone has good default settings for the scanner, I'm all ears.

I also have some web space I'd donate to this group for pics/tech info to
share.  If interested I can send someone the password for access if they'd like
to set it up.  It's just sitting there.

rG

Tom & Lou Krajci wrote:

> You've heard me mention over previous months about how hard it is to get an
> image of the gegenschein on film...a large, low contrast object, lens
> vignetting complicating things, etc.
>
> I have three negatives, taken back-to-back in Dec 99 under pretty good
> conditions in rural New Mexico at 4,800 feet elevation.  Would anyone be
> interested in scanning, stacking, processing them in an attempt to further
> extract the gegenschein?  Perhaps you would find this an interesting
> challenge?...especially because the part of the field photographed includes
> the winter milky way....which may make it tougher in attempts to remove
> vignetting (as compared to shooting the gegenschein when it's in Leo/Cancer,
> or some other uniform/bland part of the sky)
>
> I can mail the negatives out to anyone interested...I don't need them back
> anytime soon, and don't mind sending them out for this project.
>
> If more than one person is interested, we can mail the negatives in a
> round-robin fashion.
>
> Details of the three exposures:
>
> - PJ400, un-hypered, but push processed
> - 40 minutes at f/4.5
> - 28mm lens, 35mm format, K-1000 body
> - Transparency pretty good for winter time, rural New Mexico...gegenschein
> was visible to naked eye...gegenschein was approximately between M45 and
> Saturn
>
> Unfortunately I don't have a web page of my own on which to show what people
> can pull from the negatives.   Would anyone be interested in hosting some
> space for this?  (I don't think website images need to be very large/high
> res.in this case - the gegenschein is a featureless object, with no
> discernible structure within it's bounds.)
>
> Perhaps a collaborative effort could benefit the amateur astrophoto
> community at large by comparing different techniques at extracting a faint
> image (against a milky-way-mottled sky) from a vignetted negative.
>
> Thanks in advance!
> Tom Krajci
>
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