You asked
Is the panasonic leica dg 9mm f 1 7 good for landscape?
Yes, it's a sensible landscape lens, with one caveat. On Micro Four Thirds it frames like 18mm on full frame, which is a useful wide view for big scenes. The f/1.7 speed matters less here, because landscape work usually means stopping down and using a tripod, as I explain in landscape. If you want a wider or more flexible option for landscapes, the lenses page covers wide zooms.
For the body, I'd pair it with an OM System OM-1 Mark II or an OM System OM-5 Mark II. Both take this lens, and the OM-5 Mark II is the lighter choice if you'll be hiking with it.
Written by Claude from this site's pages.