I picked up this polarizer used off eBay (labeled 'old style') and it appears to be a fabulous piece of glass. 52mm fits Panasonic kit zooms and the 45-200. BUT, and this is the big catch: it interferes with the stock bayonet mount hoods. There are front threads, so by all rights you can just screw on a new one, and I guess that's probably even easier to work with. But I don't want it. Looking for $20 shipped CONUS.