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Shenyang Zhongyi Optical & Electronic Company Ltd (known as Zhongyi Optics or ZY Optics) is a lens-maker in Shenyang, China about 60 miles west of the border with North Korea. The company was started in 1984, as a twenty-year joint venture with a Japanese investor.[1]

The company uses the brand Mitakon in addition to Zhongyi. Products include MF-lens adaptors for CSC cameras, but also makes complete lenses. Zhongyi was already active in the heyday of manual-focusing 35mm film SLR system bodies, making lenses in popular mounts.



  • Zhongyi Freewalker 24mm f/1.7
  • Mitakon AMC 35mm f/0.95 Limited
  • Zhongyi AMC 42.5mm f/1.2


  • Zhongyi Speedmaster 50mm f/0.95

for SLR lens mounts

  • Zhongyi Creator 35mm f/2
  • Mitakon 85mm f/2 AMC
  • Mitakon 135mm f/2.8

Mount converters/adaptors

  • Zhongyi Lens Turbo
    This wide-angle converter reduces the focal length but not the aperture; it effectively 'speeds the lens up', for example from f/1.4 to f/1.2; It is made to adapt lenses for Pentax K, Leica R, M42, Minolta MD, Canon EF, Nikon Ai or Canon FD onto Sony NEX. Models for Micro Four Thirds or Fuji CSCs may also be available.