Re: [APML] new image: IC1396-Provia and halpha CCD

["John C. Mirtle" <jmirtle@shaw.ca>]

Interesting technique Jeff, thanks for sharing. The detail in the dark
nebula is very impressive! Excellent image. Are you planning on mosaicing
the rest of IC1396??? :-) In your message you mention Provia as the film
used, but Kodak E200 is mentioned on the web site. I am guessing this was
E200?

John Mirtle
Calgary, Ab. Canada

----- Original Message -----
From: "Jeff Ball" <jeffball@zoominternet.net>
To: "Astro-Photo" <astro-photo@seds.org>
Sent: Thursday, October 10, 2002 3:17 PM
Subject: [APML] new image: IC1396-Provia and halpha CCD


Hello all,
Thanks to Rob G for his processing tips on Halpha/RGB.  I have found the
unstretched RGB star data from my AP130EDT to be a pretty good match for my
Halpha CCD on ST10 with a TV101.  I may resort to combining film RGB with
halpha CCD quite a bit as film RGB is much easier to acquire than CCD RGB.
I have found that when using the Nikon scan (as I guess most other scanners
and software) on dimly lit slides, it is best to just use the DCH curve
adjustment which moves the entire RGB curve out and into the graph.  I think
this is more of a luminance adjustment.  I did not use the stretch function
on the RGB curves in the Nikon software and I think I get much better scans.
Adobe handles the stretching much better, I just need the Nikon sofware to
elevate the RGB to the point where it is fully available.  Oh well, here is
the image:  3 hours of Halpha on TV101 with ST10 combined with 1 x 100
minute Provia 120 on AP 130.

http://www.astro-photography.com/ic1396_haRGB.htm

I am really finding opportunities for both film and CCD.

Jeff Ball


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