You asked
Laowa 9mm f 2 8 zero d vs 7artisans 10mm f 3 5?
Both are manual-focus, unstabilised primes for APS-C, and both fit Sony E, Fujifilm X, Nikon Z and Micro Four Thirds. The main difference is the view and the light.
The Laowa 9mm f/2.8 Zero-D is the wider and brighter of the two. On APS-C it frames like 14mm on full frame, and its f/2.8 gives about the background blur of f/4.2. It's my pick for landscapes, interiors and anything where you want the space to feel big.
The 7Artisans 10mm f/3.5 is a little tighter, like 15mm on full frame, and it's slower at f/3.5. It suits you if 9mm feels too wide, and it's a sensible everyday wide for street and travel.
Choose the Laowa for width and low light, and the 7Artisans if you want a more natural view. For how aperture changes depth of field across sensor sizes, see the focal length converter.
Written by Claude from this site's pages.