Sigma 16mm f/2, 18mm f/1.8, 18mm f/2.8, 20mm f/1.8, 24mm f/1.8, 28mm f/1.8, and 35mm f/1.8 Patents Found


Sigma registered some patients in Japan for 16mm f/2, 18mm f/1.8, 18mm f/2.8, 20mm f/1.8, 24mm f/1.8, 28mm f/1.8, and 35mm f/1.8 designs.

[Publication number] JP 2020-16755 (P2020-16755A)
[Release Date] January 30, 2020
[Title of the Invention] Imaging optical system
[Date of application] July 25, 2018
[Applicant]
[Identification number] 000131326
[Name or name] Sigma Corporation
[PROBLEMS] To provide an imaging optical system which is capable of suppressing fluctuations in image magnification during wobbling, enabling high-precision wobbling operation by reducing the weight of a lens, and obtaining good optical performance, and being optimal for a mirrorless camera. I do.

  • 16mm f/2
  • 18mm f/1.8
  • 18mm f/2.8
  • 20mm f/1.8
  • 24mm f/1.8
  • 28mm f/1.8
  • 35mm f/1.8
Example 1 Example 2 Example 3
Focal length 33.99 27.99 24.00
F value 1.85 1.85 1.86
Angle of view 67.63 78.24 90.09
Image height 21.63 21.63 21.63
full length 100.00 95.01 90.00
Example 4 Example 5 Example 6
Focal length 20.59 18.60 16.54
F value 1.86 1.87 2.06
Angle of view 98.81 104.50 110.91
Image height 21.63 21.63 21.63
full length 100.00 100.03 104.04
Example 7 Example 8 Example 9
Focal length 18.60
F value 2.90
Angle of view 104.53
Image height 21.63
full length 80.00

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