MADE IN USSR!
Copy of german Biogon design, this J12 is a great 35mm lens for your FED, Zorki or Leica, Canon RF etc. With appropriate adapters can be used on modern mirrorless camera systems: Sony Nex, Canon EOS M, Nikon 1 etc*
The rear element of this lens pokes deep into the camera – not a problem for rangefinders it is designed for, but it does pose a problem for some mirrorless cameras, like Fuji X-E1, some micro 4/3 cameras and perhaps others.