RE: [APML] Cone Area Composite Collaboration

["Jon Kolb" <jkolb@datawest.net>]

Jason, Jim,

> In this case I think the halos are from the smoothing that 
> Jon did to his shot.  It caused some halos around the bright 
> stars.  When I tried to re-process his shot I could not match 
> his processing so I used it as is.  In some of my composite 
> images I have attempted to shrink the brighter stars in the 
> TP shot and this helps reduce the problem.

Halos have been a problem for me lately, and I'm starting to think it's
due to slightly soft focus.  I need to double check my KEF calibration -
I believe the current setting does not correctly match the film
thickness.  Fortunately, E200 and Provia 400F are very close (100 and
104 microns, respectively), so one setting should work for both films.

Sincerely,
Jon Kolb
Adventures in Astrophotography
http://home.datawest.net/jkolb/
jkolb@datawest.net




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