Is the panasonic lumix s 18mm f 1 8 good for landscape?

Yes, it's a sensible pick for landscapes, with one caveat. On full frame it frames at 18mm as marked, which is a wide view that suits big scenes. Landscape work is slow and usually done on a tripod, so the lens's f/1.8 speed matters less than it would for low light. You'll mostly stop it down anyway. The lens isn't stabilised, which matters little when you're on a tripod.

If you shoot landscapes on full frame, it's a good prime to start with. Check the Landscape page for what else matters in a camera for this kind of shooting, and see the Panasonic Lumix S 18mm f/1.8 page for the full camera list it fits.

Written by Claude from this site's pages.