Is the zeiss planar t 50mm f 2 zm hard to focus manually?

Here is what the site says about that.

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. Specs - Maker: Zeiss - Focal length: 50mm (prime) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 50mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

From Buying used: Checking a camera body: - Shutter count. Shutters wear out eventually. Ask for the count, or read it from a test photo's metadata with an online tool where the brand supports it, and compare with the rated life for that model. - The sensor. Take a photo of a plain sky at f/16 and look for dark spots (dust is fixable; scratches are not). - Ports, buttons and dials. Try every button, the card ...

Quoted from this site's pages.