Tag Archives: Tamron 16-70mm f/4

Sigma 135mm f/1.8 DG DN and Tamron 16-70mm f/4, 20-72mm f/4, 28-72mm f/4 Patents Found

Sigma 135mm f/1.8 DG DN [Publication Number] Japanese Patent Application Laid-Open No. 2021-85935 (P2021-85935A) [Publication date] June 3, 2021 [Application date] November 26, 2019 [Applicant] [Identification number] 000131326 [Name or name] Sigma Co., Ltd. PROBLEM TO BE SOLVED: To provide an optical system which achieves miniaturization and weight reduction while correcting various aberrations such as […]

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Tamron 16-70mm f/4 Patient Found

Tamron 16-70mm f/4 Patient [Public number] Japanese Patent Application Laid-Open No. 2021-67805 (P2021-67805A) click here [Publication date] April 30, 3rd year of Reiwa (2021.4.30) [Title of Invention] Zoom Lens and Imaging Device Embodiment 1 Focal length: 16.4867 35.0004 67.8794 mm F number: 4.1174 4.1076 4.1432 Half angle of view (degree): 53.8837 29.8398 16.1054 via hi-lows-note.blog.ss-blog.jp

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