1. I can't speak of the "Canon 50/1.2", as I won't ever have that lens; but, I do own the new Leica 50mm f/0.95 lens.
2. IMO, for a Leica M shooter that either can't or simply don't want to spend $10,000.00 USD for the Leica 50 f/0.95 lens (that I purchased) or $3595.00 USD, for a Leica 50mm f/1.4 lens, this Voigtlander Nokton 50mm f/1 Leica M Mount Lens, at $1149.00 USD, is quite a good alternative lens, IMO.
3. I have no problems with the low cost of Voigtlander lenses, as compared to Leica M lenses. For, example, some time ago, I posted in the forum here that I really didn't see much difference in the same images I shot using my new (at that time) Leica 24mm f/1.4 lens as compared to the IQ of my Voigtlander 35mm f/1.4 lens. Either way, I like using both lenses (especially the small size of the Voigtlander 35 1.4 lens); and, as I already have the Voigtlander 35mm f/1.4 lens, saw no reason to purchase a Leica 35mm f/1.4 lens (though this could change when Leica releases an update version of their 35mm f/1.4 M lens, as is rumored).
4. Sometimes, I feel as though some folks expect far more than is practical for some of their lenses, or far more than even the specifications of the lenses they purchased; and, even some of my friends, have yet to find a lens they seemingly don't dislike something about.
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BRJR ....(LOL, some of us are quite satisfied as Hobbyists ..)
Has anyone ever seen some really great photos from this lens? I've seen some OK shots but none of that lovely microcontrast that the Noctilux or Canon 50/1.2 have for example.