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Captured by
Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Jim Thommes

August 26, 2008 03:09 AM Forum: CCD Imaging and Processing/Deep Sky

NGC 7000 from Oakland (LRGB)

Posted By Jim Thommes
Jared,
The features (such as the Wall) pop pretty nice considering you did not have the benefit of H-Alpha contrast. Nice job.


August 26, 2008 03:16 AM Forum: CCD Imaging and Processing/Deep Sky

Gamma Cygni and IC 1318 - Ha RGB

Posted By Jim Thommes
Kevin, Ivan,
Thanks for the comments

Kevin,
The H-Alpha filter is actually an Astronomik clip that goes right in front of the DSLR mirror on the camera body. You can remove the camera body from the telescope using the 1/4 turn bayonet. That way you can do a Ha exposure, then dismount the camera, remove the filter and remount the camera for an unfiltered RGB exposure set. In this way the framing and orientation is preserved and your optical train is essentially undisturbed - of course refocusing is necessary without the filter.

August 28, 2008 03:23 AM Forum: CCD Imaging and Processing/Deep Sky

NASA APOD TVD

Posted By Jim Thommes
Its a mighty fine image Tom. Congrats.

September 1, 2008 08:46 PM Forum: CCD Imaging and Processing/Deep Sky

Another from Oz: SMC

Posted By Jim Thommes
Tom,
Great image. I so little about these Southern objects. It's nice to see a wide field image like this. What is the overall dimension of this field?

September 4, 2008 03:01 AM Forum: CCD Imaging and Processing/Deep Sky

The Veil,second try

Posted By Jim Thommes
Floyd,
Seem well processed to me - I like it. I wonder if you lost some color on the stars though - or is it just my monitor?

September 4, 2008 03:08 AM Forum: CCD Imaging and Processing/Deep Sky

Slowly coming back - M3

Posted By Jim Thommes
Eric,
Nice image. I like the sharp stars. I think you got the color right on.

September 4, 2008 03:12 AM Forum: CCD Imaging and Processing/Deep Sky

Wild Duck - M11

Posted By Jim Thommes
Thanks for the comments folks..

Michael Sandy said:

Very nice colors.....a sweet image of a tasty fowl. What were your subexposure and total exposure times?

Michael,
I did (12) 1 min subs for luminance and (8) 1 min subs for RGB - all 1x1 bin. Just 36 minutes total.



September 10, 2008 03:33 AM Forum: CCD Imaging and Processing/Deep Sky

M33; first pass

Posted By Jim Thommes
Great image Tom. I would just about be calling a result like this my final pass. The H-Alpha regions really pop out.

I do have a question... your exposure data suggests (to my understanding) that your luminance was 680 minutes and your Ha was 210 minutes? I would have thought the other way around.

September 10, 2008 03:35 AM Forum: CCD Imaging and Processing/Deep Sky

First Light ST10XME

Posted By Jim Thommes
Sam,
Looks real nice. Congrats on the new camera and first light image.

September 10, 2008 03:39 AM Forum: CCD Imaging and Processing/Deep Sky

LBN 208 - Cygnus - Ha RGB

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

Eric, what an imagination you have!I think the Astronomical Union needs to hire you to come up with more common names for objects. You could really spice up the Astronomy community.

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