Re: [APML]: Color Film and Filters

["Patrick W. Greenlee" <patrickg@nosc.mil>]

>Considering the variance I've seen among the various films used for color
>astrophotgraphy, I suspect the response of the layers is different for
>different films. H-alpha is definitely *red*. Yet I've seen the same nebula
>with varying degrees of red on different films.
>
>I don't think anyone using color films for astrophotography is claiming
>their photos are _true_ representations of the universe nor do I think
>they should worry about it. I prefer to think of them as approximations
>and enjoy them for what they are.
>
>Chuck  <aa6g@aa6g.org>

Chuck et al,

Given that different observers have different signal to noise ratios and
sensitivities in their sensors (human optical system) as well as a
different  distribution of color versus monochrome detectors (rods and
cones) it is obvious that no one rendering would be true for all.  This is
without considering image size on the retina and the variation in response
across the retina and a gazillion other things even more boring to most
folks.  Don't we typically treat this topic as unscientifically as we can
when comparing our "perceptions."  This typically leads into either holy
wars or folks agreeing to not agree about differences of opinion.  I don't
see anyone disagreeing about science in this discussion.  As long as we a
low the other person the latitude to "feel" how they want about a
subjective issue and not demand that they feel like us, there should be a
chance for us all to enjoy ourselves.  This is not intended to stifle
scientific enquiry, but on the contrary, to allow it to flourish without
being overshadowed by "much ado about nothing."

Sorry for the William S.

Patrick

P.S.  SKUNKS!!