page_title: Zuiko
section_title: Minor systems
hierarchical_section_title: Zuiko / Interchangeable lenses / Minor systems
caption_attribution_description: Deutsch: M42 Offenblendmessung Olympus
context_page_description: 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 means 'Light of the Gods', using a character from the Mizuho Optic Research Laboratory, where the lens was developed, and a character from Takachiho Corporation, which would eventually become the Olympus Corporation.
  With the introduction of the Micro Four Thirds system in 2008, new lenses for that system started to be branded as M.Zuiko Digital.
context_section_description: Prior to the lenses built for the Pen-F half-frame camera, Olympus produced the Ace rangefinder camera in 1958. Four Zuiko-branded lenses were sold for the Ace. The Ace was followed up by the Ace-E of 1959, which added a selenium light meter; the Ace-E was rebranded as the Sears Tower 19 for America. Sears also offered two accessory lenses (35mm f/2.8 and 80mm f/5.6) for the Tower 19.
  Between the Pen-F and the OM system cameras, Olympus manufactured the FTL camera with a M42 lens mount modified to pass aperture information to the camera's internal meter. Olympus offered six lenses with the FTL. Both cameras took 35mm film, but the lenses are not interchangeable between the two systems.
caption: Rear of Olympus M42 lens for FTL
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