You asked
Is the leica super vario elmarit sl 14 24mm f 2 8 asph good for landscape?
Yes, the focal range suits landscapes. At 14mm on full frame you get the big skies and strong foregrounds that the landscape guide describes, and the zoom reaches 24mm for tighter scenes. It's a wide zoom in the classic sense, just a little wider than the 16-35mm most people start with.
The f/2.8 aperture is more than most landscape work needs. You'll usually stop down to f/8 or f/11 for depth, so the extra speed mostly adds weight and cost. It isn't stabilised either, but that matters less when you're on a tripod.
If you'd like something lighter and cheaper, look for an f/4 wide zoom. This lens works on full-frame bodies such as the Leica SL3 and the Panasonic Lumix S5 II. For the reasoning behind focal lengths, see Lenses.
Written by Claude from this site's pages.