What is the 7artisans 7 5mm f 3 5 good for?

Here is what the site says about that.

From 7Artisans 7.5mm f/3.5: 7Artisans 7.5mm f/3.5: A prime lens by 7Artisans for APS-C cameras, 7.5mm f/3.5. Specs - Maker: 7Artisans - Focal length: 7.5mm (prime) - Maximum aperture: f/3.5 - Made for: APS-C sensors - Mounts: Canon EF, Nikon F - Stabilised: no - Autofocus: no, manual focus What it frames like - On APS-C (Nikon F): like 11mm on full frame; f/3.5 gives about the depth of field of f/5.2 there. - On APS-C (Canon) ...

From 7Artisans 7.5mm f/2.8 Fisheye II: 7Artisans 7.5mm f/2.8 Fisheye II: A prime lens by 7Artisans for APS-C cameras, 7.5mm f/2.8.

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