Re: [APML] LPS filters and wide angle pictures

["Chris Cook" <ccjd@ix.netcom.com>]

Thor -
Very cool windmill shots(the non IDAS ones)! :-)
The IDAS filter doesn't work to well with wider angle lenses.  I first read
about them being angle sensitive in S&T years ago when there was a test
report done on them.  I think it was written by Johnny Horne.

Chris

----------------------------------
Chris Cook
Astronomical & Nightscape Photography
www.abmedia.com/astro

-----Original Message-----
From: Thor Olson <Thor.Olson@EFI.COM>
To: 'Discussion of Film Astrophotography' <astro-photo@seds.org>
Date: Friday, February 21, 2003 11:49 PM
Subject: [APML] LPS filters and wide angle pictures


>Hi APML,
>After the recent discussion about light pollution filters,
>I thought I would write about a recent experience I've had.
>
>About a year ago I tried to take some nighttime landscapes
>of the windmills at Altamont Pass and was disappointed with my
>overexposed results (in spite of there being no moon).
>I returned again this year, armed with the Hutech LPS filter that I
>have had modest success with for astrophotos.  Here is a
>description of my results this time:
>
>http://www.nightscapes.net/techniques/LightPollutionFilter/LightPollutionFi
l
>ter.html
>
>and another comparison:
>
>http://www.nightscapes.net/photos/startrails/Startrails2/Altamont.html
>
>It's an interesting effect, but not what I was after!
>
>Thor.
>
>Thor Olson
>web-res astrophotos at:             http:\\www.nightscapes.org
>
>   "Man has ten, computers have two, Nature has e fingers."
>
>_______________________________________________
>Astro-Photo mailing list
>Astro-Photo@seds.org
>http://seds.org/mailman/listinfo/astro-photo
>

_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo