On Mon, 8 Oct 2001 18:54:38 +0100, Tony Morgan wrote:

[...]
>There are two kinds of polarising
>filters, linear and circularising. The former is better for reducing
>reflections and the latter is better for colour saturation.
[...]

Ummm..., actually, both types have the same effect
on color and reflections - the "circular" actually
is a "linear" with an extra layer to satisfy AF and
metering needs of some cameras (but the effect is
otherwise invisible...).