Sigma 70-200mm f/2.8 DG DN OS Sports B&H Photo / Amazon / Adorama The Sigma 70-200mm F2.8 DG DN OS has already been announced, but the patents were just filed and found. overview [Publication number] P2025043459 [Release date] 2025-04-01 [Name of invention] Large aperture ratio telephoto zoom lens [Application date] 2023-09-19 [Applicant] [Identification number] 000131326 [Name or company name] … Continue reading Sigma 70-200mm F2.8 DG DN OS Patents Found