I recently bought a polarizing filter for my camera and finally got a chance to try it out. I was immediately impressed with the results. I still need to do more experimentation with it bit I think It will serve my needs. Since I use an autofocus DSLR, I bought a circular polarizing filter. I chose the Tiffen over the Hoya strictly on price. In my quick experiment I had the sun to my right. I took several shots rotating the filter through its axis. There was some variation in those shots but in general they were all clearer than the unfiltered control. This new filter is now part of my standard toolbox.