Olympus AF-1 Twin

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The Olympus AF-1 Twin (Infinity Twin in the US) of 1988 has a biaxial (two-lens) system so the user can switch between a 35mm wide-angle lens and a 70mm telephoto lens at the touch of a button. It also has the weatherproof design used on the other models in the Olympus AF series. The AF-1 Twin is the first model in the AF series with moulded plastic lenses; Olympus had to overcome moisture absorption (for a splashproof camera) and other issues. A Quartzdate model was available.


  • Lens: Switchable between 35mm, f/3.6 (3 elements, 3 groups) and 70mm, f/6.3 (5 elements, 5 groups).
  • Autofocus
  • Auto-exposure, with shutter speeds of 1/15-1/750s.
  • Auto-flash.
  • Weatherproof.
  • DX decoding of 35mm film, ISO 50-3200.
  • Motordrive
  • XA-style lens protection.
  • Tripod socket.
  • Power: 3V Lithium CR123A or DL123A (2x)