Viltrox af 13mm f 1 4 vs sigma 12mm f 1 4 dc contemporary?

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From Sigma 12mm f/1.4 DC Contemporary: Sigma 12mm f/1.4 DC Contemporary: A prime lens by Sigma for APS-C cameras, 12mm f/1.4. The widest f/1.4 autofocus lens for APS-C, about 18mm equivalent. Specs - Maker: Sigma - Focal length: 12mm (prime) - Maximum aperture: f/1.4 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Canon RF - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X): like 18mm on full frame; f/1.4 gives ...

From Viltrox AF 13mm f/1.4: Viltrox AF 13mm f/1.4: A prime lens by Viltrox for APS-C cameras, 13mm f/1.4. Specs - Maker: Viltrox - Focal length: 13mm (prime) - Maximum aperture: f/1.4 - Made for: APS-C sensors - Mounts: Fujifilm X, Sony E, Nikon Z - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Fujifilm X, Sony E, Nikon Z): like 20mm on full frame; f/1.4 gives about the depth of field of f/2.1 there. ...

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