Viltrox af 14mm f 4 air vs sony fe 14mm f 1 8 gm?

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From Sony FE 14mm f/1.8 GM: Sony FE 14mm f/1.8 GM: A prime lens by Sony for Full frame cameras, 14mm f/1.8. Specs - Maker: Sony - Focal length: 14mm (prime) - Maximum aperture: f/1.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 14mm. - On APS-C (Sony E): like 21mm on full frame; f/1.8 gives about the depth of field ...

From Viltrox AF 14mm f/4 Air: Viltrox AF 14mm f/4 Air: A prime lens by Viltrox for Full frame cameras, 14mm f/4. A very small full-frame ultra-wide. Specs - Maker: Viltrox - Focal length: 14mm (prime) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, Nikon Z, L-Mount): as marked, 14mm. - On APS-C (Sony E, Nikon ...

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