You asked
Is the 7artisans 10mm f 2 8 fisheye ii good for landscape?
Yes, with a caveat. On full frame this lens gives you 10mm, which is in the wide range the landscape guide recommends for big skies and strong foregrounds. The fisheye bend is a look of its own, though, so it suits creative wide shots more than a straight, natural landscape view.
Landscape work is slow and usually done on a tripod, so manual focus and the lack of stabilisation won't get in your way. The f/2.8 speed is more than you need, since you'll mostly shoot between f/8 and f/11 for depth and sharpness.
If you want a conventional wide view, a rectilinear wide zoom will give you a more natural result. You can check the full specs on the 7Artisans 10mm f/2.8 Fisheye II page.
Written by Claude from this site's pages.