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Posts Made By: Cal Sandfort

January 31, 2005 09:46 PM Forum: CCD Imaging and Processing/Deep Sky

West of the cone

Posted By Cal Sandfort
I occasionally hunt around objects with a 180mm Nikon lens, then image the interesting parts with a longer focal length. This is the area directly west of the Cone/Christmas Tree complex. I liked the dark nebula and structure on the right side of center in this image. However it seems to look better in the original resolution.

Cal

January 31, 2005 09:55 PM Forum: CCD Imaging and Processing/Deep Sky

California Nebula

Posted By Cal Sandfort
As I mentioned in my "West of the cone" message I use a 180mm Nikon lens but usually don't like that wide of a field image. But the California Nebula fits the lens/camera combination nicely.

Cal

February 7, 2005 01:25 AM Forum: CCD Imaging and Processing/Deep Sky

Rosette in H-alpha

Posted By Cal Sandfort
I reshot two hours of the Rosette Nebula last night before the clouds rolled in. Unfortunately, I started the exposures and did not look at them until today and it looks like there was a tracking issue. Oh well, it'll come up again smile

FSQ-106, ST-10 and Astrodon 6nm Ha filter.

Cal

February 9, 2005 10:12 PM Forum: CCD Imaging and Processing/Deep Sky

NGC 3628

Posted By Cal Sandfort
You guys know how much I love my H-alpha but I decided to dust off and try the color filters smile

AP155, f/7 & ST-10. LRGB = 60:30:30:30m

Cal

February 9, 2005 11:27 PM Forum: CCD Imaging and Processing/Deep Sky

M78

Posted By Cal Sandfort
Another image from last night. I wanted more L and was waiting to get it tonight but the clouds rolled back in, so here it is.

AP155, f/7 & ST-10. LRGB = 60:30:30:30m.

Cal

February 16, 2005 08:06 PM Forum: CCD Imaging and Processing/Deep Sky

M81

Posted By Cal Sandfort
This is the first round of processing on this object from last night.

AP155/7, ST-10XE. LRGB = 75:40:40:40 min.

Cal

February 18, 2005 11:22 PM Forum: CCD Imaging and Processing/Deep Sky

M81 redone

Posted By Cal Sandfort
I reshot the color frames after calibrating on a G2V star and still got goofy colors. I noticed that I was having big problems with the blue flat frames so I contacted Don Goldman for advice and he was incredibly helpful. Unfortunately, we decided the blue filter has problems so off it went in the mail hopefully to return like new wink

Fortunately, the moon is up so I can return to H-alpha for now.

The core is suppose to be yellow and the arms blue but they aren't so what you get to see is what the optics can resolve.

Cal

February 23, 2005 04:42 PM Forum: CCD Imaging and Processing/Deep Sky

Another Horsehead in H-a

Posted By Cal Sandfort
I started out excited by the clear sky but just returned from a trip, was tired and pooped out after an hour and a half. This is nine, ten minute subframes. More exposure may smooth it out.

AP155/7, ST-10 and Astrodon 6nm H-alpha filter. Cropped and reduced for the web.

Cal

February 25, 2005 05:57 PM Forum: CCD Imaging and Processing/Deep Sky

IC410 - core

Posted By Cal Sandfort
I had taken a wide field image of IC410 some time ago and liked the structure in the central portion so I imaged that last night.

AP155/7, ST-10 and Astrodon 6nm H-alpha filter.

Comments and criticism welcome - Cal

February 26, 2005 03:37 PM Forum: CCD Imaging and Processing/Deep Sky

NGC281

Posted By Cal Sandfort
This is another object that I think has some interesting structure and nebulosity.

AP155/7, ST-10, 6nm h-a filter from twelve, ten minute frames.

Cal

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