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Lawrence Parchman

Sculptor Galaxy (NGC 253)

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Posts Made By: dan kowall

September 14, 2007 03:38 PM Forum: CCD Imaging and Processing/Deep Sky

Online Prints of Astrophotos

Posted By dan kowall
I had heard people recommend Costco. I was skeptical, but gave them a shot and was pleasantly surprised.
You have to pay a fee to join, but the cost of the prints is reasonable and the color in the prints matches what I see on my monitor.
(Disclaimer: I haven't tried many online print services.)

dan kowall

September 17, 2007 02:48 PM Forum: CCD Imaging and Processing/Deep Sky

NGC7822

Posted By dan kowall
Ha imaging on a new moon night?
What were you thinking, Tyler? You'll be sorry when you need some RGBs and it's a full moon night.

dan

September 17, 2007 02:55 PM Forum: CCD Imaging and Processing/Deep Sky

Crescent Nebula

Posted By dan kowall
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

September 24, 2007 02:16 PM Forum: CCD Imaging and Processing/Deep Sky

The Pleiades

Posted By dan kowall
Thanks for the comments, guys.
Always appreciated.

dan

September 24, 2007 02:21 PM Forum: CCD Imaging and Processing/Deep Sky

Bubble Nebula

Posted By dan kowall
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

October 3, 2007 03:32 PM Forum: CCD Imaging and Processing/Deep Sky

Part of the Heart

Posted By dan kowall
That has to be one of your best nebula shots, Jim.
Superbly processed.

dan

October 7, 2007 04:56 PM Forum: CCD Imaging and Processing/Deep Sky

M57 at almost full moon

Posted By dan kowall
Charles Hakes said:
...........there was an irritating gradient I suspect from the mostly full moon behind me that didn't subtract out with the flat frame........
A flat won't remove a gradient caused by a full moon or light pollution. Flats remove the effects of vignetting and dust motes.
Ron Wodaski details a procedure on how to remove gradients in his first book.
Even easier is to use Russ Croman's gradient remover program:
http://www.rc-astro.com/resources/GradientXTerminator/index.html

dan kowall

October 10, 2007 03:01 PM Forum: CCD Imaging and Processing/Deep Sky

M31 after a bit of work

Posted By dan kowall
John A. Maher said:
.....I would like to here from anyone regarding tips to better exposure the dust lanes....
As someone pointed out, you need more exposure time, John.
Do you have PhotoShop? Here's a tutorial by Don Waid on sharpening dust lanes:
http://www.waid-observatory.com/article-hipass.html
Attached is a quick run through on your image. Any sharpening techniques should really be done on good quality, 16-bit data, though.

dan kowall

October 16, 2007 04:49 PM Forum: CCD Imaging and Processing/Deep Sky

vdB27 area in Taurus

Posted By dan kowall
That is superb, Tom.

dan

November 8, 2007 06:55 AM Forum: CCD Imaging and Processing/Deep Sky

The Owl Cluster

Posted By dan kowall
Good job taming the bright star in that field, Jim.
The colors look good, too.

dan

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