Zuiko is a brand of optical lenses made by Olympus Corporation that was used up to and into the Four Thirds system era. The name Zuiko (瑞光) means 'Light of the Gods', using a character from the Mizuho Optic Research Laboratory (瑞穂光学研究所), where the lens was developed, and a character from Takachiho Corporation (高千穂製作所), which would eventually become the Olympus Corporation.
