From: Dennis Persyk (dpersyk_at_antispamdomain.not)
Date: Tue Nov 25 2003 - 21:08:19 EST
That's an very nice image of the veil.
Your problem lies not so much in processing but more in acquisition.
At f/2.8 the lens has a bit of chromatic aberration, enough to make
the stars fat. If you stop down to f/5.6 you will have tighter
stars. The factor-of-four loss in sensitivity hurts, but sometimes
that is the only way out. The veil is pretty dim against the rich
star field. That's why many image the luminance in H-alpha to dim
down the bright stars.
Digital Development tends to increase contrast of stars, so you might
try just levels and curves. I like DD for instant, one-stop-
processing, but sometimes it is not the best operator.
Clear skies,
Dennis Persyk
Igloo Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL
--- In digital_astro_.at._yahoogroups.com, <gregharp_.at._s...> wrote:
> I'm processing some shots of the Veil Nebula from last night, but
I'm having some trouble. Basically, while I can bring the levels up
to the point where I can see the nebulosity, I can't do so without
bringing up so many stars that it's like viewing it through a snow
storm. >
> http://www.pbase.com/image/23629356
>
> Any suggestions?
> > --Greg
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