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Posts Made By: Charles Hakes

November 6, 2010 09:34 PM Forum: CCD Imaging and Processing/Deep Sky

NGC 2244 - Rosette Nebula Core

Posted By Charles Hakes
Both are nice. I do like that the diffraction spikes are so much less pronounced in the Ha version. Maybe a mix with the L for the color luminance?

November 11, 2010 01:57 PM Forum: CCD Imaging and Processing/Deep Sky

Glorious weather

Posted By Charles Hakes
Nice results. I am glad that someone has been able to take advantage of this recent Colorado weather. I have had several evening activities and early morning commitments, so have missed too many great nights.

Charlie

November 11, 2010 02:06 PM Forum: CCD Imaging and Processing/Deep Sky

California Nebula from Nightfall

Posted By Charles Hakes
Nice image and nice field of view. I guess I need to add that TV85 to the list of refractors to consider.

November 11, 2010 02:11 PM Forum: CCD Imaging and Processing/Deep Sky

Another California Nebula

Posted By Charles Hakes
I also like what the Ha added as far as contrast and detail. Can you tell us more about the new processing? I am still trying to figure out the "best" way to combine those. But maybe that depends on the object.

Charlie

November 11, 2010 02:21 PM Forum: CCD Imaging and Processing/Deep Sky

Sharpless 187

Posted By Charles Hakes
That is a really interesting region. Sure, it could use more time, but I think you balanced the colors well. It might be the stretching, but is there a hint of reflection nebula near the bright star in the middle? And just out of curiosity, how did you come up with 7 minute subs for L (and the detail page says for Ha too)?

Charlie

November 13, 2010 10:43 PM Forum: CCD Imaging and Processing/Deep Sky

Weird SNR

Posted By Charles Hakes
That does sort of look like field rotation. But not quite the same as I saw with using the LX200 in alt-az. There is a photoshop trick with layers to reduce elongated stars, and I'll bet it would work with this too, just a bit more challenging to implement. Yes, definitely worth another visit.

November 13, 2010 10:47 PM Forum: CCD Imaging and Processing/Deep Sky

Abell 85 in colour

Posted By Charles Hakes
Of course you can always use more data, but this one shows off the background stuff nicely.

November 13, 2010 10:58 PM Forum: CCD Imaging and Processing/Deep Sky

NGC 654 etc.

Posted By Charles Hakes
Did you ever work with a dozen people looking over your shoulder?

It worked this time.

http://www.fortlewis.edu/observatory/image_detail.asp?ID=241

November 13, 2010 11:10 PM Forum: CCD Imaging and Processing/Deep Sky

Sadr and the red clouds

Posted By Charles Hakes
Yep. Still trying to sell me on the 85...

November 14, 2010 02:25 PM Forum: CCD Imaging and Processing/Deep Sky

Flare from Compressor/Field Flattener

Posted By Charles Hakes
I see this all the time on the Meade, but I never thought about it having to do with the reducer. (I don't recall if there is currently a Meade or Celestron 6.3 reducer installed.) I just assumed it had something to do with something shiny "upstream". Just within the last couple of weeks I had considered trying to install a knife-edge on the front end of the JMI focuser - that would make it before the flattener. I do have a standard "worst case" ready for testing - the horsehead:

http://www.fortlewis.edu/observatory/image_detail.asp?ID=150

This was 4 ten minute images. Each one was "dithered" by >~10% of the frame. That makes the ring move around. You can still see the reflection "ghosts" in the dark area. That has been my solution, but it would be good to know if it is really in the flattener.

By the way - my biggest concern using the reducer has been the stars turning into little comets around the edge. Especially if the spacing or alignment isn't perfect.

I would really hate to lose the extra field of view.

Charlie

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