Quote:
Originally Posted by AG Hybrid
Nice work. Busy field you have there.
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Thanks Adrian!
Pleased you liked it.
Quote:
Originally Posted by Paul Haese
Definitely star profile related and was not suggesting it was decon related. The star profile of the Ha is a lot smaller than the RGB star set. I have seen this before myself with some of my images. I found that doing a final RGB wash as you suggest with either lighten mode or screen mode works best to remove the problem. Looking forward to your next image. |
Cheers Paul.
Yes, Ha data sets typically have stellar profiles which are smaller. The Ha was only added to the red filtered data which has a larger stellar profile structure. So doubt this was the cause. I'm not using Ha as luminance which would certainly exacerbate any form of ringing. I'm thinking there is a better way of introducing RGB stars back in than just lighten mode alone. I have a few other ideas I will try. Still working through a few optical train bugs, but hopefully will release another image shortly. Thanks again for the feedback.
Quote:
Originally Posted by multiweb
That's a nice shot Jase.  How is your ASA modified? |
Thanks Marc!
Pleased you enjoyed it. Modification include a more rigid carbon fiber tube made by Public Missiles, 16" primary mirror refiguring, coating and addition of a mirror cell sling to provide improved support for the primary were done by Optical Mechanics Inc (OMI). Other components are ASA original including the OK3Z focuser and Wynne corrector, which I would argue is the best corrector on the market for newt astrographs. Keller knows his optics. The new tube is a different carbon fiber composite to the original and slightly thicker which results in a really snug fit with the mirror cell. PIA to remove and refit for mirror cleaning but hopefully wont need to do it too often.