>>3523438>Why not buy a vintage lensI'll tell you why. What I have in mind id the 7artisans 50mm f/1.1.
The f/1.5 Opton Sonnar (the vintage one for contax), costs more than 300$ in good condition, more than the chinese f/1.1. But what's more important, the chinese one has more Sonnar character than the actual sonnar wide open, and is just as sharp stopped down.
The most closely matched lens in terms of speed and character, is the 8,000$ Zunow 50mm f/1.1 or secondarily the 5,000$ 50mm f/1.1 Nikon in S mount.
So even disregarding the possibly higher performance and mount compatibility of the 7asrtisans, it's incredible value for money if you're after this kind of look.