You asked
Is the ttartisan af 23mm f 1 8 good for landscape?
Here is what the site says about that.
From TTArtisan AF 23mm f/1.8: TTArtisan AF 23mm f/1.8: A prime lens by TTArtisan for APS-C cameras, 23mm f/1.8. Specs - Maker: TTArtisan - Focal length: 23mm (prime) - Maximum aperture: f/1.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Nikon Z - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X, Nikon Z): like 34mm on full frame; f/1.8 gives about the depth of field of f/2.7 there. ...
From TTArtisan 23mm f/1.4: TTArtisan 23mm f/1.4: A prime lens by TTArtisan for APS-C cameras, 23mm f/1.4.
Quoted from this site's pages.