This Isógrafo is a 6x13 model plate. It is a simplified model without focus. To be compared to the model of the film. The lenses are Odor Berthiot F: 05.07 F = 75 mm. Patrice Barraud, in his book"" Le génie photographique d'Angers"" very interesting pages devoted to the life and work of Lucien Baudry, an Angevin watchmaker, who made the isógrafos one by one, in a very traditional way. The thoroughness of the manufacturing process never possible to achieve significant production. Each device is unique.
