This shootout compares the Voigtlander Nokton 21mm f/1.4 Aspherical to the Zeiss Loxia 21mm f/2.8 on a near-to-far landscape scene from f/1.4 through f/11.
In diglloyd Mirrorless:
Shootout: Voigtlander FE Nokton 21mm f/1.4 Aspherical vs Zeiss Loxia 21mm f/2.8: Tenaya Creek and Lingering Ice
Includes images up to full camera resolution from f/1.4 to f/11, plus crops.
If you are 'good' with manual focus, then you do want this lens, right now!
f2.8 @ 1/400 sec, ISO 50; 2019-07-10 17:01:38[low-res image for bot]
Sony A7R III + Voigtlander FE NOKTON 21mm f/1.4 Aspherical + polarizer Zeiss
ENV: Tenaya Canyon, altitude 7600 ft / 2316 m, 70°F / 21°C
RAW: Enhance Details, LACA corrected