JP S51-63635↗1976Assignee: Kino Seimitsu Kogyo K.K.Inventors: Rinzo Watanabe, Ellis I. BetenskyVIVITAR SERIES 1 70-210mm f/3.5 VMC MACRO FOCUSING AUTO ZOOM— 15 ELEMENTS / 10 GROUPS, 70-210mm (PATENT 70-205mm)