[Leica] Favorite Non-Leica-Leica Lens?

[leica at screengang.com (Didier Ludwig)]

Let me also add those two non Leica LTM lenses I'll keep in every case:

CV Color Skopar 3.5/28 - very sharp, brillant contrast, best build quality 
of all CV lenses, super compact. Some vignetting. Never have seen any flare 
in all the years I used it (which I can not say from the 35 Color Skopars PI 
and PII).

Canon 50/1.2 - great lens with a even greater fingerprint. Flare not really 
an issue if the original hood is mounted. This lens is made for being used 
wide open. So don't talk about corner sharpness at f1.2 unless your subjets 
are always in the corner, or you want to justify yourself the 10x higher 
price of your Nocti.

Didier