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Sigma 20mm f/1.4 Patent Spotted (and 23mmF1.4)

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The patent for the Sigma 20mm f/1.4 lens (as well as 23mmF1.4) has been spotted by the Japanese website Asobinet here.

This is just a variation of what would ultimately become the Sigma 23mm f/1.4 DC DN, so there are close to zero chances that Sigma will release also the Sigma 20mm f/1.4.

List of Sigma APS-C Lens Patents

Sigma X Mount Lenses

Patent Details

Example 1

  • Focal length: 22.31
  • F value: 1.46
  • Angle of view: 67.85
  • Statue height: 14.20
  • Total length: 94.32
  • Back focus: 18.7827

Example 3

  • Focal length: 20.37
  • F value: 1.43
  • Half angle of view: 72.96
  • Statue height: 14.20
  • Total length: 94.32
  • Back focus: 19.3592
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