US 3,748,021↗1973Assignee: Canon Inc.Inventors: Akira Tajima, Kikuo MomiyamaEmbodiment 2CANON FD 24mm f/2.8 S.S.C.— 24mm f/2.8, 9 elements / 8 groups
US 4,364,643↗1982Assignee: Canon Inc.Inventors: Kikuo MomiyamaEmbodiment 3CANON NEW FD 50mm f/1.2— 7 elements / 6 groups, 46° field of view