Sigma patents for a Sigma 10-24mm f/4 DG and Sigma 9-18mm f/2.8 DC were found. You can find the patents below: overview [Publication number] P2024104911 [Release date] 2024-08-06 [Name of invention] Wide-angle lens system [Application date] 2023-01-25 [Applicant] [Identification number] 000131326 [Name or company name] Sigma Corporation 2. Background Art In recent years, with the increasing […]