Tag Archives: Sigma 700mm F8 OS

Sigma 500mm F5.6 OS, 700mm F8 OS, and 400mm F5 OS Patents Found

Some new Sigma telephoto patents have been found. You can check them out below: JP 2023-170 [Publication date] 2023-01-04 [Title of Invention] Imaging Optical System [Application date] 2021-06-17 [Applicant] [Identification number] 000131326 [Name] Sigma Corporation Kind Code: A1 To provide an imaging optical system suitable for a compact and lightweight telephoto lens by having a […]

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