Cosina’s patent application was published on March 18, 2021. There are some examples such as “APO-LANTHAR 50mm F2”, but some of them are interesting such as “135mm F2” and “135mm F1.2”. [Publication Number] Japanese Patent Application Laid-Open No. 2021-43376 (P2021-43376A) [Publication date] March 18, 2021 [Application date] September 12, 2019 [Title of Invention] Imaging Optical System […]
