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Captured by
Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Jim Thommes

May 23, 2010 12:35 AM Forum: CCD Imaging and Processing/Deep Sky

NGC 4261 - NGC 4281 region with the David Levy MN1

Posted By Jim Thommes
Thanks for the comments folks.

No Jeff, I will not be getting rid of my trusty C8. My interests have taken me more toward shorter FL though. But I will still use the C8 at 1200 mm when I am looking for a longer focal length. As I said in an earlier post though - I think I am putting the C8 away until next Galaxy season.


May 23, 2010 07:40 PM Forum: CCD Imaging and Processing/Deep Sky

M8 and M20 widefield

Posted By Jim Thommes
Amazing image Greg. It can be seen that a lot of signal can be obtained in a relatively short time at f/3.65.

May 25, 2010 04:06 AM Forum: CCD Imaging and Processing/Deep Sky

NGC6188

Posted By Jim Thommes
Thats a really super image Greg. Its one I would like to get sometime. But like Charlie, it ain't anywhere near my zenith.

Jim Thommes

May 25, 2010 04:10 AM Forum: CCD Imaging and Processing/Deep Sky

Omega Centauri - NGC 5139

Posted By Jim Thommes
Thanks for the comments guys...

Yep Tom, new camera and new scope.

Jim Thommes

May 28, 2010 03:00 AM Forum: CCD Imaging and Processing/Deep Sky

Omega Centauri - NGC 5139

Posted By Jim Thommes
Thanks for the comments folks.

Regarding shooting low (to the horizon), I understand Sky&Tel is running an article in their July issue on this subject. It will be interesting to see the article.

May 30, 2010 06:55 PM Forum: CCD Imaging and Processing/Deep Sky

DWB-111 Propeller Nebula

Posted By Jim Thommes
Cool image and capture. I'm looking forward to more adta plus color.

May 30, 2010 07:06 PM Forum: CCD Imaging and Processing/Deep Sky

Centaurus A 15 hours and blue jet

Posted By Jim Thommes
Greg,
Great catch and great image. The blue jet is kind of interesting. It doesn't seem to point to the center of the main eliptical. Some believe the the diagonal dust feature is a swallowed galaxy. One can almost imagine the jet coming from where one might guess what would have been the center of this "swallowed" galaxy.

May 31, 2010 11:28 PM Forum: CCD Imaging and Processing/Deep Sky

Lagoon Nebula

Posted By Jim Thommes
Thanks for the comments folks.

Richard, I sent you a PM, I have a few questions about your suggestions.

June 20, 2010 12:07 AM Forum: CCD Imaging and Processing/Deep Sky

Finally an image!

Posted By Jim Thommes
Hi Floyd,
The larger hi res version shows off a lot. I like it best . Great image.

June 22, 2010 02:01 AM Forum: CCD Imaging and Processing/Deep Sky

Extinction Scale Factors

Posted By Jim Thommes
Charles,
Interesting, I have been using Extinction Scale factors for some time now. the table I use I developed from some other data and they are not as strong as yours.

http://www.jthommes.com/Astro/ExtinctionRates.xls
Also some examples here:
http://www.jthommes.com/Astro/NGC5128_ColorCor.htm

I have also taken into account various altitudes - Sealevel, 1, 2, and 3 KM in altitude.


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