Hi Martin and welcome to the forum!
Usually Landscape photography is associated with wide angle lenses but longer lenses are of course used. Zoom lenses are popular as they assist with getting that all important composition correct. Using Prime lenses make you think a little more about composition. using a longer lens such as your 200mm would mean you have to consider your composition a little more. Common Lenses would be in the area of something like 16mm - 30mm focal length, but see how you get on with the 200mm before you splash out on a new lens.