Skiopticon image from the Department of Photography at the Royal Institute of Technology. Use by Professor Helmer Bäckström as lecture material. Bäckström was Sweden's first professor in photography at the Royal Institute of Technology in Stockholm objects according to E. Jewell for examining the negative material resolution ability (left). To the right one thus performed more info see: Bäckström, Helmer. Photographic manual. Nature and Culture. Stockholm. 1942. , 1141

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Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
Model Released: No

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