Re: [APML] Cederblad 214, NGC 7822

[lkt <tan@cox.net>]

Rob,

 Very nice image and yes the stars are much tighter in this version.
Interesting, so the blue halos were due to an out of focus blue channel?
Do you think blending of HA and red actually made a difference in star
sizes or is it just better blue focus? Thanks.

Loke




Robert Gendler wrote:
> 
> Thanks Volker and Chris.
> What I did differently with this one was to make a blend of the
> HA data and red channel (using lighten) and then substitute this
> for the red channel. In this way the stars are borrowed from the
> red channel and the RGB is now strong enough to be matched
> with the high contrast HA luminance. The problem on the previous
> image I did (IC1396) was imperfect focus for the blue channel. I spent
> more time on this image getting good focus so there are no blue halos.
> Rob Gendler
> Email: robgendler@att.net
> Web site: http://www.robgendlerastropics.com/
> ----- Original Message -----
> From: "Volker Wendel" <volker@spiegelteam.de>
> To: <astro-photo@seds.org>
> Sent: Sunday, September 01, 2002 10:10 AM
> Subject: Re: [APML] Cederblad 214, NGC 7822
> 
> > Simply beautiful, Rob!
> >
> > How much did you weight the h-alpha image when combining it with the
> > RGB-channels?
> >
> > Volker
> > www.spiegelteam.de
> >
> >
> >
> > > Hi all,
> > > This was taken with the Nikon 300mm lens at F4
> > > and ST10. Its an h-alpha luminance.
> > > http://www.robgendlerastropics.com/7822.html
> > > Higher res crop of cederblad 214 at
> > > http://www.robgendlerastropics.com/cederblad.html
> > > Rob Gendler
> > > Email: robgendler@att.net
> > > Web site: http://www.robgendlerastropics.com/
> > >
> > >
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