Ricoh has a new patent for a Pentax 14mm f/3.5 APS-C lens for K-mount

Ricoh has a new patent (JP2024-067293A) for a 14mm f/3.5 APS-C lens for K-mount (21mm equivalent). The inventor is Takahiro Nakayama, the same person who designed the optics of the HD Pentax-DA★ 16-50mm f/2.8 ED PLM AW lens.

Additional information from the patent filing:

  • [Publication country] Japan Patent Office (JP)
  • [Kind of official gazette] Published unexamined patent application (A)
  • [Publication number] JP 2024 – 67293A (P2024-67293A)
  • [Date of publication of application] Reiwa 6(2024) May 17 (2024.5.17)
  • [Application number] Japanese Patent Application No. 2022-177252 (P2022-177252)
  • [Filing date] Reiwa 4(2022) November 4 (2022.11.4)
  • [Identification Number]000006747
  • [Problem] To provide an imaging lens, an interchangeable lens, an imaging apparatus, and an information processing apparatus which can achieve miniaturization and a wide angle.
  • [Means for solving] The zoom lens includes a negative first lens unit, a positive second lens unit, an aperture stop, a positive third lens unit, and a fourth lens unit. The refractive power of the fourth lens unit is weakest among all the lens units. The first lens unit includes a negative lens having a concave surface directed toward the image side. The fourth lens group is composed of a single lens or a cemented lens, in which a surface closest to the object side is a concave surface facing the object side, and a surface closest to the image side is a convex surface facing the image side.

Thanks Mistral75!

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