New camera, new screw in filter.
I've purchased a Panasonic Lumix FZ100 camera and needed a new 52mm threaded polariser. So one short trip to ebay later and I have ordered a Hoya Por1 Digital filter. Rather nice all in all - however, I now conclude it is the worst polarizer I've ever owned.
Well, the first thing I managed to do is get a finger print on the glass surface, polarisers are often pigs to clean and this proved to be the case and repeated wiping with a lens cloth has caused the coatings to start wiping off.
You can't see the current lost areas (both sides) on pictures yet but as the filter hasn't been out of the house yet I can't imagine it's going to last long as pretty sure I'll have to clean it again one day.