Is the 7artisans 10mm f 3 5 hard to focus manually?

Here is what the site says about that.

From 7Artisans 10mm f/3.5: 7Artisans 10mm f/3.5: A prime lens by 7Artisans for APS-C cameras, 10mm f/3.5. Specs - Maker: 7Artisans - Focal length: 10mm (prime) - Maximum aperture: f/3.5 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Nikon Z, Micro Four Thirds - Stabilised: no - Autofocus: no, manual focus What it frames like - On APS-C (Sony E, Fujifilm X, Nikon Z): like 15mm on full frame; f/3.5 gives about the depth ...

From 7Artisans AF 10mm f/2.5: 7Artisans AF 10mm f/2.5: A prime lens by 7Artisans for Full frame cameras, 10mm f/2.5.

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