Astromart

September 18, 2007 04:11 AM Forum: CCD Imaging and Processing/Deep Sky

Bubble in two color modes

Way cool images Roland!

Certainly the Ha adds impressive detail. The color of the bubble in the RGB is impressive. I con't decide which I like best - I just keep cycling back and forth between the two.

September 18, 2007 04:16 AM Forum: CCD Imaging and Processing/Deep Sky

A fresh look at NGC1333

Posted By Jim Thommes

Nice job Tom!
It seems that the color of the stars through the dust is just what one would expect - shorter wavelengths extinguished and the longer reds showing through. Nice stars - must have been good seeing - or were you using AO?

September 18, 2007 04:26 AM Forum: CCD Imaging and Processing/Deep Sky

Crescent Nebula

Posted By Jim Thommes

Thanks folks for the comments - they are much appreciated.

dan kowall said:

Fine detail, Jim.
A lot of people have trouble with the dynamic range of the Crescent and oversaturate the 'shoulders', but you've done well to preserve the detail throughout.

dan

Dan, I know what you mean about the shoulders. I did compress the range quite a bit to preserve details in the shoulders. I worried it would look too flat - and it does in mono, but the color helps a lot.

September 23, 2007 08:22 PM Forum: CCD Imaging and Processing/Deep Sky

The Pleiades

Posted By Jim Thommes

Dan,
Very nicely done with the dynamic range. The stars and nebulosity come through well. Superb image.

You chose to leave the asteroid data in. Some may choose to remove that data. What are your thoughts on the pros/cons of inclusion / exclusion?

September 25, 2007 03:52 AM Forum: CCD Imaging and Processing/Deep Sky

Bubble Nebula

Posted By Jim Thommes

Thanks for all the kind comments - they are much appreciated.

Ivan, two months would give me the shakes too. Actually, I get the shakes after two weeks.

dan kowall said:

I don't think that I've seen such good detail on the Bubble with a C8. In fact, I know I haven't.
The color is fine, too.
What did you use to get it down to f/4.2?

dan

Thanks Dan, The C8 is columated as well as I can. The f/4.2 is an under distanced Meade 0.33x reducer/corrector. Seems forgiving enough given my small chip size. You will notice the star distortion in the corners. The object was not centered so the left side was cropped a bit and so the distortion is more noticed on the right.

September 30, 2007 06:53 PM Forum: CCD Imaging and Processing/Deep Sky