The Chinese company 7Artisans has a new 50mm f/1.1 lens for Leica M-mount. The lens is rangefinder coupled and is probably the cheapest M-mount lens available today at $369 (listed for sale on Amazon and on eBay). A silver version is also available:
7Artisans 50mm f/1.1 lens specifications:
This lens could be a copy of the MS Optical Sonnetar 50mm f/1.1 MC lens Voigtlander Nokton 50mm f/1.1 lens.
Update: additional information on this lens can be found here.
Additional information and pictures:
