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 piece of blue sky from an agfacolor plate in resp. 15 and 30 times more info See: Nordic journal for photography 1944. p. 7.

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Size: 2529px × 1977px
Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
Model Released: No

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