Leica M9P, M9M, or SL?

[dotur]

Do you mean the new Leica APO-Summicron SL 50mm f2? I have no idea. As for the old collapsible 50mm Summicron in L39 or M mount, I've sold them both long ago. The rigid ones are a tad bit better.

 

[raid]

Many people swear by the L Mount Summicron.

 

[dotur]

I know they do. However, I prefer Elmar 50 2.8 for people, and for other subjects my rigid Summicron 50 from the Sixties was better and sharper than the 2 collapsible ones I've sold. But those were all secondhand, used lenses...