Image of the day

Captured by
Douglas Rollain

Lion Nebula SH2-132 - RC71

About Astromart

My Account

New to Astromart?

Register an account...

Need Help?

Posts Made By: Jim Thommes

October 29, 2005 09:08 PM Forum: CCD Imaging and Processing/Deep Sky

Planetary Nebula - NGC 6781

Posted By Jim Thommes
Greg, Tom, Stuart,
Thanks for the comments.

Stuart,
Nice HA exposure. I had actually taken an HA exposure for this image myself (as well as a luminance). I had noticed in my HA that, like yours, the central star is all but unresolvable in the HA. Yet it stands out noticably in the luminance (and blue channel of course). Your HA provides lots of detail in the expanding cloud.

November 1, 2005 03:57 AM Forum: CCD Imaging and Processing/Deep Sky

Back from imaging hiatus and first light

Posted By Jim Thommes
Hoo-wee, Jose, Great image! I like it a lot. Such nice tight stars - I think that's the FSQ for you. Congrats!

November 2, 2005 05:05 AM Forum: CCD Imaging and Processing/Deep Sky

Pelican

Posted By Jim Thommes
Roland,
Great Job! Very pleasing image to stare into; nice sharpness and contrast on the nebula features. The full crop also shows a very nice view of The Wall in NGC7000.

Congrats!


November 10, 2005 04:31 AM Forum: CCD Imaging and Processing/Deep Sky

NGC 253

Posted By Jim Thommes
Great image! Looking forward to the color.

November 11, 2005 05:27 AM Forum: CCD Imaging and Processing/Deep Sky

M31 - Andromeda

Posted By Jim Thommes
Brian and Warren

Ha! What an embarrasing situation! Yes, I too thought the colors were somewhat funky. Just wrote it off and tried to rebalance to what I have seen of M31 as best I could.

So then I receive Warren's thoughtful comment, and go back to take a look. Well apparently I used the same color channel for red and green! (Looks like red was used for both red and green).

So I will go back and reprocess to see what happens (its got to be better). Sorry to bother you all with my error. Warren thanks again for the comments that made me go back to look.

(I gotta stop processing late at night.)

November 15, 2005 12:58 AM Forum: CCD Imaging and Processing/Deep Sky

Andromeda Revisited

Posted By Jim Thommes
Greg, Warren,
Thanks for the comments - and Warren, thanks for the help. Yeah, the Luminance was 18 minutes, but as I mentioned I did combine it with some earlier data (core and galaxy area) - three 6 min subs. But yeah, 18 plus 18 was it for the luminance.

The stars are a bit funky from something going on in the cheap SLR lens. As I recall, even very short test exposures showed the stars a bit out of shape.

November 16, 2005 04:50 AM Forum: CCD Imaging and Processing/Deep Sky

Another M31

Posted By Jim Thommes
Jeff,
Yes, this image is an excellent catch. Great capture of the star forming regions. I think you are right about transparancy. Perhaps object altitude at the time of imaging had an impact? I think atmospheric extinction of the blue is a possible explanation for why some imagers capture this blue and others do not.

November 16, 2005 04:53 AM Forum: CCD Imaging and Processing/Deep Sky

California Nebula - RGB and HA

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

Stuart - good luck with the color.

November 20, 2005 07:48 AM Forum: CCD Imaging and Processing/Deep Sky

Rosette in Ha

Posted By Jim Thommes
Dan,
Raelly nice image - Cangrats!

I like the California Nebula too. Looks like you went pretty deep on it and still got tight stars. Well that's what an FSQ does.

November 22, 2005 04:59 AM Forum: CCD Imaging and Processing/Deep Sky

IC 1805 - Heart Nebula

Posted By Jim Thommes
Ivan's and Vincent,
Thanks for the comments - I appreciate them.

Funding Member

Sponsors


View all sponsors

Search