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Optior is the first camera of IOR, a metal-bodied viewfinder camera for 43x55mm frames on 120 roll film, produced between 1954-60. It has an IOR 75mm (or 60mm) f/11 meniscus lens and a single-speed shutter, 1/25 +B. There are several variations of body and front plate. [1]

Notes and referencesEdit

  1. McKeown's p.447


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