Or just look through the filter at a non-metallic surface where
reflections are visible, such as polished wood, glass, plastic, a
car, etc. Rotate the polarizer and see if it has an effect on the
reflections. If it does, turn it around and look through it from
the other side. If it does the same thing to the reflections
looking through from the other side, it's a linear polarizer.
Circular polarizers will only affect reflections one way.
Walt
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Everybody thinks they have a sense of humor, even people who
don't.
---------- Original Message ----------------------------------
From: "Jeff Keller" <jrk_om@xxxxxxxxxxx>
Reply-To: olympus@xxxxxxxxxxxxxxx
Date: Fri, 19 Dec 2003 10:14:45 -0800
>You can tell a circular polarizer by looking through it at a
>mirror. If you hold the polarizer facing the same direction as if
>it were on the lens the polarizer will look black in the mirror,
>if you hold it flipped over so that you are looking through the
>front of it, it will appear dark but not black in the mirror (I
might have the two positions swapped).
>
>-jeff
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|