What is a Vari-Filter?

"jjs" <john.DeleteThis@mychain.stafford.net> wrote in message news:<10h59v2j8pdpiad.DeleteThis@news.supernews.com>...
 > What is a "vari-filter"? It is advertised as being a gradable contrast
 > filter - something about use in conjuction with a polarizer. It seems to me
 > that a polarized filter would just gain density rather than a deeper color.

Can't find "vari-filter" using a google search on the web or
newsgroups as being anything to do with photography except in your
post. Was it advertised on the Internet some place? A few of us might
be interested in looking if you have a link. Sounds like a combination
of a graduated fileter and a polarising filter. I can see more use
keeping them separate.

A polarizing filter can give you a deeper blue sky if the sun is to
your left or right, depending on the correct rotation of the filter.
You might be interested in reading the following page:

<a style='text-decoration: underline;' href="http://www.offrench.net/photos/articles/polarizing_filter.php" target="_blank">http://www.offrench.net/photos/articles/polarizing_filter.php</a><!-- ~MESSAGE_AFTER~ -->