From: Marc Paradis (marc.paradis_at_antispamdomain.not)
Date: Tue Oct 28 2003 - 00:15:24 EST
Hi Pierre,
I selected the IDAS LPS filter mainly for its color fidelity and
effective light pollution reduction.
I posted yesterday a picture on my website showing result of a 120
sec. exposure taken at ISO1600 with my Canon 300d with and without
LPS filter.
Take a look at: http://pages.infinit.net/sidarap/photos/IDAS.JPG
Those test pictures are unprocessed: only cropped and reduced.
This test was taken at a dark site. Sky fog limit should be much more
quicker from your backyard. You will probably forced to use a LPS
filter + software processing to remove light pollution gradient.
ImagePlus software has some built-in feature to do so. Some people
are using Photoshop to build custom mask to remove efficiently the
sky background.
Good luck!
Marc
--- In digital_astro_.at._yahoogroups.com, "cyberpeterm31" <cyberpet_.at._p...>
wrote:
>
>
> hi,
>
>
> Living in a fairly light polluted sky ( suburb near city ), i have
> to deal, as many of you, with quite washed out raw pics.
> I tried long exposure of Pleiades with Orion Skyglow filter, but
the
> greenish blue nebula halo didn't show up. Up to now, i had better
> luck with no filter. So my point is : what is a good "software"
> recipe in order to remove that light pollution using IP or PS7 ? I
> am still pretty much a newbie :) !
> I have looked at other filters, specially the IDAS LPF, which seems
> great...what is your experience/suggestions on such products ?
> thanks !
>
> Pierre
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