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Posts Made By: dan kowall

June 7, 2009 05:13 PM Forum: CCD Imaging and Processing/Deep Sky

Abell 2151 in color

Posted By dan kowall
The tiny pixels of the 8300 sure seem suited to this scope. The resolution is just wonderful.
My only quibble is that Tony's latest images look a bit over-saturated on my monitor.

dan

June 8, 2009 02:03 PM Forum: CCD Imaging and Processing/Deep Sky

Crescent in Ha.

Posted By dan kowall
I think you're right about the collimation, Jason, but the ST-10 is nicely matched to your scope, right around .7 arcsec/pixel.

dan

June 29, 2009 08:33 PM Forum: CCD Imaging and Processing/Deep Sky

Here is the data on the AT8RC that Roland requeste

Posted By dan kowall
Hi Floyd,
Next time do a star rich area on a night of good seeing, no galaxies or nebulae, subtract a dark, and time your exposure so that most stars aren't saturated.
That will yield more valid data.
I'm curious to see how this puppy performs.

dan


August 1, 2009 02:00 PM Forum: CCD Imaging and Processing/Deep Sky

M8 region

Posted By dan kowall
Nicely done, Tom.
I think that you made good processing choices, especially in regards to the blue.
My regards,

dan

August 5, 2009 02:14 PM Forum: CCD Imaging and Processing/Solar System

Jupiter, 4th August

Posted By dan kowall
Anthony Wesley said:... I think this is getting close to the limits of my scope.
This condition is usually followed by a fever (aperture fever).

Just wonderful processing, Anthony. It's deft and natural with an almost 3D quality to it.

dan kowall
photonhunter.com

August 13, 2009 02:48 PM Forum: CCD Imaging and Processing/Deep Sky

The Blue Dog

Posted By dan kowall
The Blue Dog would be a great name for a drink, too.
"It gives you that hangdog hangover."
Given its size, I'm surprised that this hasn't been a common target.
Good job on finding and imaging this one, Jim.
My regards,

dan

August 15, 2009 01:38 PM Forum: CCD Imaging and Processing/Deep Sky

Ufda!

Posted By dan kowall
What makes me cry are the exposure times.
Although this one is a long one at 10--10--10 minutes, a lot of his LaSilla images are only a minute long or so in each channel.

dan

August 15, 2009 02:04 PM Forum: CCD Imaging and Processing/Deep Sky

Help

Posted By dan kowall
It has a light pollution gradient and some color noise.
Without the gradient:

August 19, 2009 02:50 PM Forum: CCD Imaging and Processing/Deep Sky

Is my Ring too pink?

Posted By dan kowall
Too pink, Louis.
What did the RGB look like? Red, I assume? If so, then list your processing steps for combining the L with the RGB. There are numerous places where you could have gone pink.
The larger stars show a distinct, hard edge within the halo. I would back off on your sharpening for a more natural appearance.

dan

September 6, 2009 09:54 PM Forum: CCD Imaging and Processing/Deep Sky

Sagittarius Milky Way

Posted By dan kowall
That is most cool, Jim.

dan

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