[APML] Processing of M42 (STL11000M)

["Robert Gendler" <robgendler@worldnet.att.net>]

The following is a summary of my processing which I hope will be
useful to anyone using digital processing techniques.

1) I stacked all the 5 minute subexposures twice, once using
sum combine for the outer fainter stuff (core blown out) and
again using median combine for the inner detail.
2) 2 RGB composites were done, one using sum combine images
and one using median combined images.
3) These two RGB's were layered in PS 6.0
4) Extensive correction of light pollution gradients was done
in PS by hand using the lasso and curves/levels
5) I then created a luminance using "all" the frames (R,G,B)
which was then processed fully in 16 bit before 8 bit conversion.
6) Multiple rounds of luminance layering were then done in PS
using the techniques described on my web site below.
http://www.robgendlerastropics.com/LLRGB.html
http://www.robgendlerastropics.com/LRGB.html
7) With each round of luminance layering I applied a minimum
filter only to the stars in the luminance layer to preserve star colors
in the color layer.
8) Final touches (saturation, leveling, curves) done in PS.


Rob Gendler
Email: robgendler@att.net
Web site: http://www.robgendlerastropics.com/
----- Original Message ----- 
From: "Bobby Middleton" <bobm@koyote.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, December 23, 2003 6:09 AM
Subject: Re: [APML] OT: New M42 (STL11000M)


> > > Dr.  M. Stecker says that one
> > > angiogram should help you pay for one of these!
> 
> <vbg>
> Bobby Middleton
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo

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