From: r_malin2 (robt.wndy_at_antispamdomain.not)
Date: Tue Jun 24 2003 - 03:14:53 EDT
Johannes,
Noticed that Marks image was taken in jpeg mode..Was yours jpeg, or
raw....???
Robert
--- In digital_astro_.at._yahoogroups.com, "Johannes Schedler"
<schedler_.at._c...> wrote:
> Very nice, Mark, even nicely framed!
>
> I could not reach your result with just the white light images,
your
> sky seems to be darker (same camera!),
>
> Johannes
>
> --- In digital_astro_.at._yahoogroups.com, "Mark Hanson" <markh_.at._t...>
> wrote:
> > Johannes,
> >
> > I posted my pic of The North American Nebula so you could see it.
> >
> > http://btlguce.digitalastro.net/latest.htm
> >
> > Mark
> >
> >
> > -----Original Message-----
> > From: Johannes Schedler [mailto:schedler_.at._c...]
> > Sent: Monday, June 23, 2003 2:45 PM
> > To: digital_astro_.at._yahoogroups.com
> > Subject: [digital_astro] New image: North America Nebula
> >
> >
> > Yesterday I was short of sleep and took a lot of images from
> NGC7000
> > in this warm midsummer night.
> >
> > The first results with 5 min at ISO800 and mag 5 sky in white
light
> > were disappointing, as almost no nebula showed up and the
background
> > was grey.
> >
> > So I tried the Lumicon 2" UHC filter with >95 transmission in H-
> beta,
> > O3 and H-alpha. 10 min shots at ISO1600 resulted in a blue nebula
> > with some red lines, but it was there!
> > See the details and result after a lot of processing, color
shifting
> > and blurring with masks to reduce the noise:
> >
> > http://panther-observatory.com/deepsky.htm#78
> >
> > Later this week I will include the filtered raws to my 10D
review.
> >
> > Hope to get some more efforts for comparison on this object from
you
> > (Rick, Mike, Mark?)
> >
> > Johannes
> >
> >
> >
> > Before posting an image to our group please read the space
mangement
> > guidelines:
> > http://groups.yahoo.com/group/digital_astro/files/Photos%
20Section%
> 20Space%2
> > 0Management%20Guidelines
> >
> > Please check the digital_astro FAQ at:
> > http://www.szykman.com/Astro/AstroDigiCamFAQ.html
> >
> > Be sure to visit the digital_astro Gallery and Archive at:
> > http://velatron.com/dca/gallery
> > http://velatron.com/dca/archive
> >
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
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