Excellent star colors in the M46/47 image. 400F did a great
job.
-----Original Message-----
From:
Jon Kolb <jkolb@datawest.net>
To:
'Discussion of Film Astrophotography' <astro-photo@seds.org>
Date:
Tuesday, February 10, 2004 9:53 PM
Subject: [APML] Hovenweep
Adventure
As
you know from my recent dark site report, I took my gear to Hovenweep National
Monument in Utah last new moon. Here are two images from that trip, both
taken with Pentax 67 cameras and the TMB152 refractor at f/7.9. As
always, your comments and suggestions are welcome.
This
shot was difficult to process for some reason, and may need more work. It's
the northern part of Barnard's loop, along with M78 and some of the pervasive
faint nebulosity in the region. The reflection nebula reported by
Marco is visible in the lower right of the image. The V-shaped
nebulosity in the upper left, which also appears to have a small reflection
component around the star at its apex, is not identified in either
Sky Atlas 2000 or Uranometria 2000.0. Does anyone have a
designation for this nebulosity? I think E200 did pretty good on M78,
but unfortunately the seeing was going downhill by the time I got to this
target that night. The exposure was 75 minutes, pushed one
stop.
I've
always wanted to shoot this pair of clusters, but it's low in the sky and is
visible at the time of year when weather can be a problem around here.
Luckily, I caught it at a good time this year, and shot it during some of the
best seeing of the night. This one was shot on Provia 400F, which I
think did a pretty good job on the star colors. 60 minutes, pushed one
stop.
Both
images were cropped somewhat to improve the composition and to eliminate a bit
of vignetting. The Barnard's shot is was not composed exactly as I'd
wished, so it is actually not cropped very much, and the vignetting
is fairly evident in the corners on the right side. I'm also still
working on an E200/400F composite of IC443 that I hope to post soon.
This month I expect to meet up with APML'er Glenn Shaw at
Chiricahua.
Sincerely,
Jon Kolb
Adventures in
Astrophotography
http://home.datawest.net/jkolb/
Life Member, International
Dark-Sky Association
jkolb@datawest.net