The Next Best Choice for a Lens for Fuji Cameras?

I was worried that when i bought the camera that nobody would buy it, and they would stop making lenses and discontinue the system. But turned out to be the opposite. They're going to keep creating lenses, hopefully. I do a lot of a black and white pictures of am, i guess i call them mountain portraits, like just of, like the face of a craggy peak with some really crazy light shining on it. And, and wish they had a bit of a longer reach for azoom. For me, a friend did lend me the tamron that is, at one 50 to 600 is a cannon. It has a big enough image circle that if i shoot in