RE: [APML] Surprise!!! Another Comet Machholz Image

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

Wade, thats really neat!  nice ion tail.  Have you considered that new epson
flatbed scanner that has 4800 dpi on negs and slides too?

Chris

-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of Thomas W. Earle
Sent: Sunday, March 27, 2005 5:48 PM
To: astro-photo@seds.org
Subject: [APML] Surprise!!! Another Comet Machholz Image


Here's yet another Comet Machholz image.  Yes, I'm just full of
them.  It's another experiment with Provia 100F.  I sure wish Mother
Nature would have been a little more cooperative this night;
unfortunately, she brought in an onslaught of thin cirrus which
dramatically diminished the ion tail.  In fact, while I was guiding,
the brightness values on the STV ranged from 2000-4000, the lower
value being a result of cirrus.  It rarely achieved 4000, mostly
stayed around 3000.  Despite the thin cirrus, Provia 100F still
picked up a nice ion tail, albeit very faint.  On the original, it
stretches about 4 degrees.  Even though you can't see it in this
image, the star colors are phenomenal.  I guess this is why so many
people use Provia 100F for star trails.  This was a 90 minute
exposure guided on the comet.

http://www.northwest-landscapes.com/html/comets/comet_machholz6.html

I hope you enjoy,

Wade


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