On 10/18/2010 11:17 AM, David J. Littleboy wrote:
wrote in message
...
"Michael wrote:
wrote:

IIRC the Sigma 12-24mm only accomodated cut-gel filters in a slot at
the rear, not threaded front screw-on types.

12-24mm with 82mm Polarizer:
http://wemightneedthat.biz/Images/12-24.jpg


What possible use is a polariser on a lens of this focal length range?
Even at 24mm on APS-C, there are very few shots where a polariser
would give a useful result.

Polarizers reduce specular reflections from foliage resulting in far better
(more saturated) rendition of the green of the foliage. It's a big
difference. Very useful. The shots in the big, glossy, color landscape
magazine are almost all taken with a polarizer. It even works with wide
angles.

Shh! Brucie is not interested in anything he can't bluster about.
Of course you're right.

--
Peter