Re: [APML] Blue response on astrophotos

["Carlos Milovic F." <cmilovic@yahoo.es>]

Hi Ray

> [...] Whether you do some
> manual, nonlinear 
> "curves" adjustment (which personally I disapprove
> of...!) or a linear 
> transformation of the dynamic range above the
> background level (a lot 
> more objective and scientific) is up to you.
> 

I don't see your point. Film is by no ways linear, and
you can easily see that if you divide by a flat image.
By the other hand, were are not here making
scientificaly useable images, in fact, with film and
our equipment is almost impossible (how can we
characterice the response of the film? And what about
the vigneting pattern?). Also, there is the problem of
the scanninf process... So, I can't see the point on
avoiding the use of nonlinear curves adjustements.



=====
Regards,

Carlos Milovic F.
-------------------------
Astro & Photo - CMF
http://www.astrophoto.vze.com
-------------------------
Visita "AstroFoto", el foro de astrofotografía en español
http://espanol.groups.yahoo.com/group/astrofoto


		
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