When you think of focal lengths in landscape photography, lenses like a 24mm or 16-35mm probably come to mind, and for good reason, as wide angle lenses help to capture those beautiful scenes in one frame. That being said, longer focal lengths have their place too, and this excellent video features a seasoned landscape photography discussing just why he bought such a lens for his own work.
Coming to you from Alister Benn of Expressive Photography, this interesting video features him discussing why he purchased a 150-600mm lens for his work. Though most landscape work is shot with wider focal lengths, supertelephoto lenses can be a fantastic way to create more abstract shots that isolate a single interesting element in the scene or to take advantage of telephoto compression to bring elements closer together to create a sense of drama. Because so much landscape work is done at wider focal lengths, simply using a longer lens can help your portfolio stand out a bit more as well. Check out the video above for Benn's full thoughts.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."
I tested this lens recently. Awful sharpness and CA.