Is the zeiss planar t 50mm f 1 4 hard to focus manually?

Here is what the site says about that.

From Zeiss Planar T* 50mm f/1.4: Zeiss Planar T* 50mm f/1.4: A prime lens by Zeiss for Full frame cameras, 50mm f/1.4. Specs - Maker: Zeiss - Focal length: 50mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Canon EF, Nikon F - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Canon EF, Nikon F): as marked, 50mm. - On APS-C (Nikon F): like 75mm on full frame; f/1.4 ...

From Zeiss Planar T* 50mm f/2 ZM: Zeiss Planar T* 50mm f/2 ZM: A prime lens by Zeiss for Full frame cameras, 50mm f/2.

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