What are the alternatives to the 7artisans 12mm f 2 8 ii?

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From 7Artisans 12mm f/2.8 II: 7Artisans 12mm f/2.8 II: A prime lens by 7Artisans for APS-C cameras, 12mm f/2.8. Specs - Maker: 7Artisans - Focal length: 12mm (prime) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Nikon Z, Canon RF, Micro Four Thirds - Stabilised: no - Autofocus: no, manual focus What it frames like - On APS-C (Sony E, Fujifilm X, Nikon Z): like 18mm on full frame; f/2.8 gives about ...

From 7Artisans 10mm f/2.8 Fisheye II: 7Artisans 10mm f/2.8 Fisheye II: A prime lens by 7Artisans for Full frame cameras, 10mm f/2.8.

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