Astromart

September 7, 2005 08:37 PM Forum: CCD Imaging and Processing/Deep Sky

"The Wall" NGC 7000

Thanks guys for the comments...

Greg,
Yeah, the two scopes have different fields - but not substantially so. It's really not much different from aligning RGB's to a luminance. Astroart has a coregister function based on three stars. IRIS can do it as well based on three stars. Both do a scale, rotate, skew as needed to align the stars. I believe there is another program called Registar that does the same thing but taking into account more stars.

September 11, 2005 09:18 PM Forum: CCD Imaging and Processing/Deep Sky

M 31 Core

Posted By Jim Thommes

Dan,
Great job on the core. I vote for a mosaic of the full object if you get a chance.

September 13, 2005 04:17 AM Forum: CCD Imaging and Processing/Deep Sky

Helix Nebula

Posted By Jim Thommes

Ivan, Stuart,
Thanks for the comments I appreciate them...

I feel like I am getting good results from the Artemis camera, thanks - and on the C8, I think I have it columated about as well as a C8 can go. I did it in a large indoor area with an artificial star. It was a comfortable set up with convenient access to the screws - glad I took the time to do it.

September 17, 2005 11:06 PM Forum: CCD Imaging and Processing/Deep Sky

Atik 16 ccd camera for autoguiding

Posted By Jim Thommes

Hi Bea,

You might find the information you need at the Artemis website (these are the people making the camera).

http://www.artemisccd.co.uk/downloads.htm

Here is a document that might be helpful:

http://www.pmdo.com/artdownloads/populatedboards.pdf

The gentleman who can be most helpful is Arthur Edwards at:

a m b e r m i l [email protected]

(remove spaces in ambermile).

Finally, the quickest way to get help is the "ArtemisCCD" group on Yahoo Groups.

September 20, 2005 03:21 AM Forum: CCD Imaging and Processing/Deep Sky

M33 - Two Views

Posted By Jim Thommes

Greg and Stefan,
Thanks for the comments on the images.

Stefan,
I am not sure which image (or both) you are referring to on the star halos. But I have a couple of theories - the images were taken on different nights and as near as I could tell pretty clear skies.

1. The wider field shot was made with a refractor (Megrez) and a SCT f/6.3 reducer. This combo is likely to give some poorer color correction an so the wideband Luminance exposure will likely "defocus the stars.

2. The close up shot was made with a C8 and FR3.3 - the CCD is really too large for this set up and there is heinous coma on the edges. I correct this with a second luminance shot (with less detail / depth) from the 80mm refractor. This genearlly causes softer stars on the edges for this image. (But it's 1000% better than the coma from the C8/FR on the edges). The reason I torture myself with such a convoluted exposure/processing is the really good data I get in the center 2/3rds of the image from the C8/FR3.3.

September 24, 2005 06:35 PM Forum: CCD Imaging and Processing/Deep Sky

M33 - Two Views

Posted By Jim Thommes

Thanks Ivan, Charles, Tyler for the comments on the M33 image.

September 24, 2005 06:52 PM Forum: CCD Imaging and Processing/Deep Sky

IC410/NGC1893 revisited

Posted By Jim Thommes

Nice one Tom. I really like the capture of the tadpoles. I think I want to go for this one too. Looks like your image has inspired a few of us to add this to our target list.

September 25, 2005 11:52 PM Forum: CCD Imaging and Processing/Deep Sky

M15 from Utah

Posted By Jim Thommes

Nice image Tyler. I see you have chosen an interesting framing for this object along with some prominent stars.

Interesting technique, I may try it on some of my images. Thanks for sharing.

September 25, 2005 11:56 PM Forum: CCD Imaging and Processing/Deep Sky