50mm F1.2 DG DN art


いつ発表、いつ発売?

https://www.j-platpat.inpit.go.jp/c1800/PU/JP-2019-197125/F01F57980463D48C7A98D478A91BDB250D621196DADED1B0DC95A473EB09F6A4/11/ja