Adapter ring/teleconvertor lens for FZ10

[aghauri]

I have panasonic FZ10. I am thinking of buying teleconverte lens, filter and adapter. I read about a Yoshida adpter with step down of 52 mm ring. Any suggestions abot which adapter size will be good and what kind of teleconvertor lenses includind wide angle be good for FZ10. Also need some kind of filter to protect the lens as well.

Thanks

aghauri