OM-System Zuiko 50mm f/1.8

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The Olympus OM-System Zuiko 50mm f/1.8 Auto-S lens was manufactured by Olympus for 35mm SLR cameras. The 50mm was a standard lens usually provided as a kit lens with 35mm cameras such as the Olympus OM-1 or Olympus OM-G.

As a cornerstone of the OM lineup, this lens had a long production run through several minor revisions. From earliest to latest, these can be identified as:

  • "silvernose" (bright chrome rings around filter thread)
  • blacknose but still engraved "F.ZUIKO" (F= 6th letter of alphabet, indicating 6 elements)
  • engraved "ZUIKO MC" (multicoating)
  • engraved "made in Japan" (all lowercase aside from the "J")


  • Badging: Olympus OM-System Zuiko Auto-S
  • Manufacturer: Olympus
  • Manufacture Date: 1972 onwards
  • Focal Length: 50mm
  • Aperture Range: f/1.8 - f/16
  • Diaphragm Type: Automatic
  • Diaphragm Blades: 6
  • Filter Diameter: 49mm
  • Minimum Focus: 0.45 m (17.7 in)
  • Mounts: Olympus OM
  • Elements: 6
  • Groups: 4
  • Weight: 170 g (6 oz)
  • Accessories: unknown
  • Example Serial Numbers: 3248058
  • Original Stock Number(s): unknown