Is the laowa 9mm f 5 6 ff rl hard to focus manually?

Here is what the site says about that.

From Laowa 9mm f/5.6 FF RL: Laowa 9mm f/5.6 FF RL: A prime lens by Laowa for Full frame cameras, 9mm f/5.6. A 135-degree rectilinear ultra-wide, the widest made for full frame. Specs - Maker: Laowa - Focal length: 9mm (prime) - Maximum aperture: f/5.6 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, L-Mount, Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Sony E, Nikon Z, L-Mount, ...

From Laowa 11mm f/4.5 FF RL: Laowa 11mm f/4.5 FF RL: A prime lens by Laowa for Full frame cameras, 11mm f/4.5.

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