Skiopticon image from the Department of Photography at the Royal Institute of Technology. Use by Professor Helmer Bäckström as teaching material. Bäckström was Sweden's first professor in photography at the Royal Institute of Technology 1948-1958. Stairwell. The picture is written: Naphtholgrün (naphthol green) for more info: see photographic manual of Helmer Bäckström. Nature and Culture. Other revised edition 1958-59. Cape 40 Color filter manufacture. (page 351 and following).

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Size: 2117px × 2361px
Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
Model Released: No

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