Andre, I would second Dan's advice and say that a 80 XL should be a good choice for landscape if you can wait on it's availability. You may later want also a more tight lens such as a 210, a nd finally a medium wide angle such as a 110mm. I have not been in Norway but think a short telephoto such as a 210 could do wonders there to get some field compression and for details. It makes a different kind of images than those you will get from the 150 A-S (superb!) and from a wider angle. All these lenses are also very useful with a rollfilm back. But do not assume you need the whole set of lenses right at start. In fact, you may gain in photographying with a limited pair of lenses and learn more in image composition than if you had a bag full of lenses. Good trip!