A high quality-sounding filters, something robust, at an affordable price in an attractive package. The first experiences are very positive. Other experiences have yet to be won. But I think with this polarizing filter I have not done anything wrong, so of me 5 stars. Addendum dated 19.08.12 Be careful when fasten firmly !!! The filter appears attach itself to. You get him hard again. Must now unfortunately deduct 1 star. Sorry