“R. Berthon and M. Audibert patented a method of obtaining a virtual image by means of an anterior lens and prisms or mirrors. This idea was further improved upon in E.P. 17,023, 1913. In F.P. 458,040 Audibert proposed to use a negative front lens ...
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Credit: Cinémathèque française, conservatoire des techniques, Paris.
- Credit: Cinémathèque française, conservatoire des techniques, Paris.