You asked
Voigtl nder apo lanthar 35mm f 2 aspherical vs zeiss loxia 35mm f 2?
These two are close to twins. Both are 35mm f/2 manual-focus primes for full-frame cameras, neither is stabilised, and on APS-C they both frame like 52mm with the depth of field of about f/3. The real difference is mounts. The Voigtländer APO-Lanthar 35mm f/2 Aspherical comes in Sony E, Nikon Z and Leica M, while the Zeiss Loxia 35mm f/2 is Sony E only.
If you shoot a Sony E body, either lens will do the job, so choose on the look and price you prefer. If there's any chance you'll move to Nikon Z or Leica M, the Voigtländer is the safer buy. For what to do with a 35mm, the portraits guide explains why it suits environmental shots that show where someone is.
Written by Claude from this site's pages.