I have a Pansonic FZ7 which I am very happy with. However I want to buy some lens for it, but I am worried if I buy this sort of stuff I would be stuck with lens and accessories for a none standard camera. Would I be better selling my beloved Pansonic and buying a Nikon D40 so I can then use standard lens or would stuff my Panasonic work with other cameras? It uses Lieca lens but I have no idea what mounting system it uses. The lens are fixed but you can buy telephoto lens and filters etc for it.