Hey I've got a FujiFilm Finepix S7000 and am gonna purchase a telephoto attachment. 'The built-in' zoom is 6x optical and the lens is rated at 1.5x. My question is, would my new optical zoom be 7.5 or would it be 9x? I really do not intend to waste my money for an extra 5 or so feet of zoom. I'd rather purchase a whole new camera that holds a bigger lens.