The Focasix is a 6x6cm rangefinder camera with interchangeable lenses, developed by OPL, the maker of the Foca. The shutter is focal plane, from 1s to 1/1000, synchronized at 1/25. The only lens known, a collapsible Foca Oplar 7.5cm f/3.5, is interchangeable with a bayonet mount. The film advance, made by a lever, is coupled to the shutter, and an exposure counter is built in.
It is said only 50 Focasix bodies were built, marked Foca Six.
Princelle has proposed that this camera could have been an extrapolation of the Pontiac Versailles project, but the theory by Vial that the Versailles evolved as the Lumière Lumiclub and Lumière 6×6 seems more probable.
- Princelle, Jean Loup. Foca Historica. Mialet, France: Éditions Cyclope, 1997. ISBN 2-910284-38-6.
- Vial, Bernard. Histoire des appareils français. Période 1940–1960. Paris: Maeght Éditeur, 1980, re-impressed in 1991. ISBN 2-86941-156-1.
- The Foca lens page at Roland Weber's great site, has info about the Focasix lenses (in French)