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Re: [APML] M33 TV-85, ST2000XM
Hi Dave:
Wow- that's an amazingly low red weighting! So the original reddish image
had a red weighting of 0.1? Hard to believe that you really used that low a
value. I would try running the color combine again and being sure that there
isn't some typo sneaking in there. I use the ST-10XME and I know the
weighting is a bit different but not THAT different. (Mine are around 1.2,
1.0, and 1.7 [RGB].) Were your exposures equal across all three filters?
Check Don Goldman's site for his recommendation for your ST2000XM. He's done
careful studies of optimal weightings. Your blue image looks like good data,
but it's lacking all the nice HII regions that are in the M33 arms (which
your red image does have).
Bert
Bert Katzung
katzung1@comcast.net
www.astronomy-images.com
----- Original Message -----
From: "Dave Manifold" <dave@davidmanifold.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Monday, September 22, 2003 2:48 PM
Subject: Re: [APML] M33 TV-85, ST2000XM
> Hi Bert,
> I adjusted by weight in the combine. The ratios were:
> Red = 0.1
> Green = 0.7
> Blue = 1.8
> I can turn up the green very easy in in Photoshop,same with the blue.
But,
> it tends to turn the whole image green, or blue. For some reason, red was
> just totally over saturated and I had to turn it as far down as I could on
> the color combine.
> I did another edit, the first edit, where it was more bluish, and this
> reddish looking one is the second edit. I still have the blue one file.
> Here it is:
> http://www.davidmanifold.com/M33st2k.jpg
> and, here is the recent edit with so much red:
> http://www.davidmanifold.com/M33st2k.htm
>
> It sounds like maybe I should post the blue one....The blue one doesn't
have
> an unsharp mask or BGsmooth.
>
> Dave...
>
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