Re: [APML] NGC 2392 revisited

[Sean Walker <vze2c3z8@verizon.net>]

Hi Mike-
I never have any luck doing any auto stuff in Maxim.
For this image, I selected 16 manual points for the background noise, then played
around with the PSF settings- I settled on a PSF of 1.4, with 20 iterations of Max
Entropy. it still came out heavy handed, but useful for layering into the final
image.

Sean Walker

"Mike Cook, AF9Y" wrote:

> John,
>
>    Very impressive!  I'm surprised that the deconvolution was that
> effective on a film image.  I've never had much luck with the MaxIM
> deconvolution.  Did he select the reference star and noise areas or
> was it all auto?  Also how many iterations?  I've found AIP4WIN's
> LR deconvolution much more effective on my CCD images.
>
> From:                   "John Boudreau" <jeboud@mediaone.net>
> To:                     <astro-photo@seds.org>
> Subject:                [APML] NGC 2392 revisited
> Date sent:              Tue, 1 Jan 2002 21:25:55 -0500
> Send reply to:          astro-photo@seds.org
>
> > A Happy New Year to all of you!
> >
> > I finally got around to processing some shots of NGC2392 taken back in
> > October, using Fuji Provia 100F @ f/11 on my 12"SCT. The best 3 of 5 images
> > were stacked in RegiStar, processed in Photoshop 6, and touched up with
> > Bgsmooth.
> >
> > The results were much better than my previous image of this object from
> > early 2001, and a few days ago I showed the results to my friend and fellow
> > APML'er Sean Walker. Since the noise level in the image was reasonably low
> > (for film), he asked for the original RegiStar tiff file so he could try his
> > hand at deconvoluting it with MaxIm DL. This helped pull out even more
> > detail --- we have both tried our hand at film image manipulation with MaxIm
> > DL in the past but this is a particularly interesting result, I think. I did
> > feel the need however, to "soften" the result somewhat by cloning in my
> > Photoshop version at about 20%.
> >
> > Close up at: http://people.ne.mediaone.net/jeboud/ngc2392.htm
> >
> > Wide field version: http://people.ne.mediaone.net/jeboud/ngc2392_wdfld.htm
> >
> > And finally I put up a temporary page to show the comparison of my original
> > result, and Sean's original deconvoluted version:
> > http://people.ne.mediaone.net/jeboud/ps6_vs_mdl.htm
> >
> > Comments of both flavors always welcome.
> >
> >
> > John Boudreau
> > jeboud@mediaone.net
> > http://people.ne.mediaone.net/jeboud/astro.htm
> >
> >
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>
> Mike Cook, AF9Y
> http://www.webcom.com/af9y
> mwcook@cris.com
>
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