The Koniken is a Japanese 6×6 pseudo TLR, made in the 1950s by an unknown company. The name of the camera is an obvious rip-off of Konica and Nikon. The only surviving example observed so far is pictured in Takasaki.
The body of the Koniken is much inspired by the Ricohflex III, but the camera is fixed-focus. The film is advanced by a knob on the photographer's right. The name KONIKEN is inscribed in capital letters on a nameplate in front of the viewing hood.
The shutter gives B, 25–200 speeds and is perhaps of the everset type; it is synchonized via a pin placed on the side. The viewing and taking lenses are inscribed KONIKEN ACHROMAT U.S. 1:3.5 F=80mm on the silver rim. At first glance, the diameter of the barrel and front element would fit f/3.5 lenses, but U.S. aperture 3.5 (in the Uniform Scale) actually corresponds to f/11: what looks like the front element is certainly a piece of plain glass, and the lenses are hidden behind.
- Takasaki Akio (高崎晶夫). "Kokusan 6×6cm-han nigan-refu A to Z" (国産6×6cm判二眼レフA to Z, Japanese 6×6cm TLR A to Z). Kamera Rebyū: Kurashikku Kamera Senka (カメラレビュー クラシックカメラ専科) / Camera Review: All about Historical Cameras no.49, December 1998. ISBN 4-257-13022-9. Amerika-sei 35mm renzu-shattā kamera (アメリカ製35mmレンズシャッターカメラ, issue about American 35mm lens-shutter cameras). Pp.64–73.