Re: [APML] Film Tri-Color Filters?

[Colt Bednorz <colt@airmail.net>]

Shekhar,
I spent a year making my decision. In my opinion
these were the best around short of doing what
Chuck Vaugn did.
The gaps didn't bother me nor did they seem to bother
the images I studied. If you intend to use them for daylight
photography, then you've got a problem.
Do the graphs, study the transmission characteristics and apply
all of this to the film or chip sensitivity that you intend to use them
with.
Then- well-- write a check.
Colt Bednorz

Shekhar Borde wrote:

> > Colt wrote:
> > The gaps bothered me. I finally ordered them anyway and
> > have always wondered -  if there is nothing in the gaps
> > why would it matter anyway.
>
> Well, there may not be an emission line in the gaps but
> depending on the object there is still some broadband
> emission you would lose and that could cause a color shift.
>
> > Bert wrote:
> > If the red-green filter gap is deliberate, it may be because there are
> > significant mercury and sodium lines in that area (eg, street light
> > pollution).
>
> If that's true then I think it is a misguided design
> approach to try and target light pollution with gaps in
> a tricolor filter set, but you may be right about the
> reason.
>
> Shekhar
>
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