Thanks Jerry, I'll look into that option.
Gary
----- Original Message -----
Sent: Friday, April 01, 2005 1:03
PM
Subject: RE: [APML] Hutech IDAS LPS
Filter Question
All hope is not lost...
If you have mostly sodium
vapor light pollution (red sky background at
night), you can try using a
simple Cyan CC filter.
If you have mostly mercury vapor light pollution
(green sky background at
night), you can try using a simple Magenta
filter.
Jerry
At 12:07 PM 4/1/2005, you wrote:
> >
Thanks Ulrich. Do you know of a LPS filter
> > the WILL work
with a 55mm lens?
>
>Sorry, I don't. And as far as I know, there
isn't really anything that
>can compete with an IDAS
anyway.
>
>I don't know the exact physics of LPS filters, but as
far as I know,
>they all rely on light hitting the filter at a certain
angle - maybe
>someone else can tell us
more?
>
>Ulrich
>
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list
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Photoshop
for Astrophotographers
http://www.astropix.com/PFA/PFA.HTM
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