You asked
7artisans af 10mm f 2 8 vs sony e 11mm f 1 8?
The two are close, and both are APS-C primes with autofocus and no stabilisation. The 7Artisans 10mm f/2.8 frames like 15mm on full frame and gives about the depth of field of f/4.2. The Sony E 11mm f/1.8 frames like 16mm and gives about the depth of field of f/2.7.
I'd pick the Sony E 11mm f/1.8 if you shoot Sony and want to work in low light or get more background blur. Its f/1.8 is much brighter, and that matters more than the one millimetre difference in view. I'd pick the 7Artisans 10mm f/2.8 if you want the wider view, or if you also use Fujifilm X or Nikon Z, since it mounts on all three.
For how aperture changes depth of field across sensor sizes, see the focal length converter. For a general starting point, see your first lenses.
Written by Claude from this site's pages.