Is the leica super elmar m 21mm f 3 4 asph hard to focus manually?

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From Leica Super-Elmar-M 21mm f/3.4 ASPH: Leica Super-Elmar-M 21mm f/3.4 ASPH: A prime lens by Leica for Full frame cameras, 21mm f/3.4. A small 21mm; needs an external finder, live view or an EVF. Specs - Maker: Leica - Focal length: 21mm (prime) - Maximum aperture: f/3.4 - 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, 21mm. Cameras it fits ...

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 ...

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