Sigma 12mm f 1 4 dc contemporary vs zeiss touit 12mm f 2 8?

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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 Zeiss Touit 12mm f/2.8: Zeiss Touit 12mm f/2.8: A prime lens by Zeiss for APS-C cameras, 12mm f/2.8. Specs - Maker: Zeiss - Focal length: 12mm (prime) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X): like 18mm on full frame; f/2.8 gives about the depth of field of f/4.2 there. - On the larger-sensor ...

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