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 spectra for KJ, AGCL and Agbr after R Hilsch and more info see: cosmos. SWEDISH SCIENCE PRESS. Lazy. 1944. p. 132.

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Size: 1989px × 2513px
Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
Model Released: No

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