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  #21  
Old 12-10-2013, 06:05 PM
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Peter Ward
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Tough target. Nicely handled
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  #22  
Old 12-10-2013, 06:38 PM
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I like the blue colouring and the galaxies showing in this scene. There are quite a few to check out. I like the expansive field of view too, showing a lot of this object. I don't think there is a gradient. I found when I imaged a portion of this object that my colouring looked consistently like what you have here but you have a little more saturation that I do. It's a tough object that likes plenty of integration time if one is using short subs (10 minutes or less) with a narrow aperture, so kudos for producing a pretty noise free image.

What I think detracts this image is the star shapes. The smaller images don't show any problems but the hi res image shows stars that are elongated to some degree or another over the entire field. It's particularly bad in the top left corner and that is what you see straight up when you open the image.

Like I said though, there is plenty to like.
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  #23  
Old 12-10-2013, 08:52 PM
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Quote:
Originally Posted by RickS View Post
Very nice Witch Head, Greg! It's a difficult one to process.
well done
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  #24  
Old 13-10-2013, 10:09 AM
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Quote:
Originally Posted by Peter Ward View Post
Tough target. Nicely handled
Thanks very much Peter.


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Originally Posted by Elio View Post
well done
Cheers Elio.

Quote:
Originally Posted by Paul Haese View Post
I like the blue colouring and the galaxies showing in this scene. There are quite a few to check out. I like the expansive field of view too, showing a lot of this object. I don't think there is a gradient. I found when I imaged a portion of this object that my colouring looked consistently like what you have here but you have a little more saturation that I do. It's a tough object that likes plenty of integration time if one is using short subs (10 minutes or less) with a narrow aperture, so kudos for producing a pretty noise free image.

What I think detracts this image is the star shapes. The smaller images don't show any problems but the hi res image shows stars that are elongated to some degree or another over the entire field. It's particularly bad in the top left corner and that is what you see straight up when you open the image.

Like I said though, there is plenty to like.
Thanks Paul.

Yes the frailities of piggyback guide scope guiding.

I plan on tweaking the polar alignment again and doing a 300 point T-point model and using Protrack to help.

Also I need to install a support block system I used once at home with this setup as the focuser tube has flexure with the heavy Proline camera. Its a great camera but its very heavy and too heavy for this focuser. Yuri also makes a heavy camera ring to support the focuser.
Ideally I would use an OAG and an Atlas focuser and lock it all down. So part is tilt, part is guiding a bit weak and part is low in the sky where the seeing is poorer and the guiding not as good. Other objects higher up with the same setup gave better stars. It really was quite low when imaged.

Greg.
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