Re: [APML] RG200+SHQ100 Composite Posted

["Chris & Jennifer Cook" <ccjd@ix.netcom.com>]

Jon -
That's a nice image.  It almost has a tri-color look to it.  Interesting.
Thanks for posting!

Chris

==================
Chris Cook
http://www.abmedia.com/astro


-----Original Message-----
From: Jon Kolb <jkolb@mindport.com>
To: 'astro-photo@seds.org' <astro-photo@seds.org>
Date: Monday, November 05, 2001 7:12 AM
Subject: [APML] RG200+SHQ100 Composite Posted


>Here's one I've been playing around with for a while.  It's a composite of
>two shots taken in September with the Epsilon on 35mm hypered Royal Gold
200
>and hypered Fuji Super HQ 100.  I took John Boudreau's advice and hypered
>the RG200 for 2 hours, 50C, 3 psi.  The SHQ100 was hypered for 3.5 hours,
>50C, 3 psi.  Both of these films showed strong blue response - one of the
>reasons for this composition was to see about that.
>
>There was a lot of interesting faint stuff in the scans, some of which was
>beyond my skills to bring out well in the final (sRGB) image.  I've been
>experimenting with different techniques in PW, including brightness masks,
>processing R, G, and B channels individually, and attempts at
>anti-vignetting.  I was unable to duplicate Sean Walker's AV technique in
>PW, mainly because none of the blur transformations I tried would blur the
>image as much as the example in S&T.  This resulted in much less effect
>during the composite step, requiring more of the overlay to be applied, and
>ultimately causing a loss in the faint details.  I'm still trying some
other
>methods, and I'll post one if it works out.  Oval-based gradients have
shown
>some promise, but I haven't mastered them yet.
>
>http://home.datawest.net/jkolb/ngc_6914.htm
>
>Sincerely,
>Jon Kolb
>Adventures in Astrophotography
>http://home.datawest.net/jkolb/
>jkolb@mindport.com
>
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