I found this link while searching for more 30.5mm Filters: http://www.sigma-imaging-uk.com/a_pages/accprice.htm
30.5mm Filter Set for the Sigma 600mm F8 @ �59.99 James - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
