[APML] OT (slightly) M82 Reds

["Chris Schur" <cschur@therim.com>]

Hi all,

I used a technique I developed for film imaging when combining red filtered
tech pan images with color supra 400 shots for this CCD image.  I wanted to
share with you the result so you can try it too on your film shots.  The
method combines a deep Ha or red filtered shot with a white light color
image.  Rather than just add them and combine using the LAB method, (Ala
Gendler), I first adjust both images in PS to be same background density,
and a good appearance for to be a decent shot on its own.  Then I paste one
over the other (after registering!).  I combine the layers with lighten.
What happens is really cool - the white light image has the bright stars,
blue nebs and stellar core.  The Ha shot has the bright Ha regions and a
host of IR stars.  Combining with Lighten does this:  the brightest of both
shots becomes the final image.  So in that final image, you get it all - a
great white light color image with enhanced Ha nebs and lots of neat IR
stars all over.  Here's a (gulp) CCD shot using this exact technique.  I
hope you can use it on your film shots!

http://www.psiaz.com/schur/astro/ccdimagepages/m82-2.html


Take Care,

Chris Schur


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