On Tue, 27 Nov 2007 23:04:45 +1300, "Alan McGrath" wrote:

I have a Canon S3 IS camera and would like to attach a polarizing filter to
it. As some of you may know the S3 has a retractable lens barrel. I feel
the only solution is to use a "Cokin" type filter. If anyone has
experience of this combination or something similar I would welcome your
comments.


http://www.adorama.com/ICALAS3.html

Use any 58mm threaded filter that you want.