Tag Archives: Sigma 90mm f/2.8

Compact Sigma 70mm f/2.8, 90mm f/2.8, and 100mm f/2.8 Patents Found

New Patents for compact mirrorless lenses have been found from Sigma. The 90mm has already been announced. Applicant: Sigma Co., Ltd. Publication number: P2022061515 Application number: P 2020169465 Publication date: 2022-04-19 Title of invention: Imaging optical system PROBLEM TO BE SOLVED: To provide a compact imaging optical system having a quiet and rapid focus in […]

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