Re: [APML] Two new images

[John Laborde <jlaborde@ix.netcom.com>]

Title:

Chris,

Your right. the second seagull shot is over smoothed. I usually try to do
as little smoothing as possible. You can only stretch a weak image so far
before the grain becomes too overwhelming. I have noticed by experimenting
that if you do grain reduction on weak images after a moderate stretch it
will boost the week nebulosity enough so you can manipulate it using other
tools. In this case I had to do a fair amount of grain reduction just to
get the nebulosity out of the noise.  I'm not a big fan of over smoothed
images and actually put noise back into an image that seems too smooth. One
trick I have tried that works pretty well  is to blend a pre-grain reduced
image with a grain processed image using "screen" mode in "apply image".
I probably should have done that here.

John

Chris Schur wrote:
> John, I really like the M35 region and first seagull
> shot, very nice!  The second larger seagull is a bit
> over smoothed, but shows nice detail.  If you always
> leave about 1/3 the grain, images will still look
> pretty natural.
>
> Chris
> --- John Laborde <jlaborde@ix.netcom.com> wrote:
> > I have just poster two new images. For shot like
> > these, I usually like 
> > to get 2 or 3 images stacked together to reduce
> > grain and gain enough 
> > density. But these shots were just time killers
> > while I was waiting for 
> > my main target to rise high enough to shot so there
> > is only one image 
> > each.  I don't thing I will be able add more images
> > this month since 
> > these targets are now getting low in the west. I
> > will have to wait till 
> > next year. In the meantime here are the single shot
> > images.
> >
> > IC2177 ( seagull nebula) also M50, NGC2335, NGC2343,
> > NGC2345, NGC2353, 
> > and Sharpless 2-294
> >
> >   
> http://aisig.sdaa.org/astroblogDetail.asp?imgID=447&UserID=67
> > IC2177 (close up)
> >
> >   
> http://aisig.sdaa.org/astroblogDetail.asp?imgID=448&UserID=67
> > M35 and IC443.  Also NGC2158, NGC2174, and Sharpless
> > 2-247
> >
> >   
> http://aisig.sdaa.org/astroblogDetail.asp?imgID=449&UserID=67
> > IC443 (cluse up)
> >
> >   
> http://aisig.sdaa.org/astroblogDetail.asp?imgID=450&UserID=67
> > John Laborde
> >
> > _______________________________________________
> > Astro-Photo mailing list
> > Astro-Photo@seds.org
> > http://seds.org/mailman/listinfo/astro-photo
> >
> >   
>
> 		
> __________________________________ 
> Yahoo! Messenger 
> Show us what our next emoticon should look like. Join the fun. 
> http://www.advision.webevents.yahoo.com/emoticontest
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo



_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo