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RE: [APML] New Images Posted
Nice work Jon. I like the Gamma Cygni shot, and the widefield Cygnus. It
always amazes me the difference in frame size between the 35mm and 6x7
shots.
Scott Hammonds
-----Original Message-----
From: Jon Kolb [mailto:jkolb@datawest.net]
Sent: Tuesday, October 05, 2004 11:12 PM
To: 'Discussion of Film Astrophotography'
Subject: [APML] New Images Posted
Finally some new material! I hadn't been out since February, and that trip
was a bust, so at long last here are a few new film images, taken during
adventures in three states.
This one is a composite of a Provia 400F shot done at Hovenweep National
Monument in Utah back in January with an E200 shot done a couple of weekends
ago out on the eastern Colorado plains. Both are 75 minutes with the TMB
152, pushed one stop. I tried a new technique for combining the images this
time. After registering the images in Registar, I made a mask of the stars,
then added the two shots instead of blending them, using the mask to keep
from adding the stars and blowing them out. It turned out alright, I
suppose. There was a little water vapor in the air on the 400F shot, but it
seemed to help the final image more than it hurt it.
http://home.datawest.net/jkolb/ic405-410_tmb152.htm
I haven't had a decent shot of Gamma Cygni up for awhile, so here's an
attempt with the TMB 152.
http://home.datawest.net/jkolb/gamma_cygni_tmb152.htm
This is one you don't see often, and it took several attempts over the last
year to get even a marginal shot like this. There is some trailing, and the
color balance looks a bit off, but this one is as good as it's going to get
for now. I probably won't keep shooting this one, but if I do I'll use some
Provia 400F to try and get more of vdB 140 in the lower right. Perhaps John
Mirtle has done a better job of this one on Tech Pan - it seems like a
target he might shoot.
http://home.datawest.net/jkolb/sharpless_2-129.htm
Here's a widefield shot with the Pentax 67 and 200mm f/4 lens at f/5.6.
This one came out very crisply, and shows what this lens is capable of
during periods of terrific seeing. 40 minutes on E200, manually guided.
Registar says there are 169,762 stars in the frame!
http://home.datawest.net/jkolb/cygnus_200mm6x7.htm
This one shows a familiar area around IC1396 and includes Sharpless
2-129 that was shot with the TMB 152. It looks like the Barnard objects and
rampant nebulosity east of IC1396 might make a good subject for the big
refractor - one reason I like to take widefield shots like these.
Another 40 minute shot on E200, manually guided.
http://home.datawest.net/jkolb/southern_cepheus_200mm6x7.htm
Here's another survey shot. I wanted to see if there was anything worth
shooting at longer focal length around Sharpless 2-205 way down in the lower
left. vdB14 and vdB15 near the center of the frame are almost there, but
has anyone else ever noticed the faint bubble of nebulosity just west of
these objects and ESE of IC1848? It's pretty faint, but it's there. This
was manually guided for 45 minutes on E200. Registar says there are a
whopping 176,649 stars in this one - almost hard to believe and I wonder if
it's counting hot pixels or something. Still, I love all the stars in this
shot.
http://home.datawest.net/jkolb/cassperscam_200mm6x7.htm
And finally, what adventure would be complete without a star trails shot.
This one is of a big tree of unknown species (to me, anyway) at the site
I've used a few times now in the San Mateo Mountains, Cibolla National
Forest, New Mexico. This place is the darkest site I've used, south of the
VLA and southwest of Socorro.
http://home.datawest.net/jkolb/san_mateo_mountains.htm
Comments, constructive criticism, and inveterate tinkering are welcome as
always.
Sincerely,
Jon Kolb
Adventures in Astrophotography
http://home.datawest.net/jkolb/
Life Member, International Dark-Sky Association jkolb@datawest.net
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