http://www.bhphotovideo.com/bnh/controller/home?O=Search&A=details&Q=&sku=90027&is=REG&addedTroughType=search

I'd be using it with a 49mm-52mm step up ring and the Sanyo 49mm adapter.

Sorry I'm a total noob and never owned a xacti, but doesn't the xacti's filter thread rotate when zooming?

Just asking because the Hama website says explicitly that the lens hood can't be used then.

http://www.bhphotovideo.com/bnh/controller/home?O=Search&A=details&Q=&sku=90027&is=REG&addedTroughType=search

I'd be using it with a 49mm-52mm step up ring and the Sanyo 49mm adapter.

Did it work?

It is on sale in Japan too.
http://item.rakuten.co.jp/mapcamera/4007249931245/