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 the aperture aperture ABCD parallel to the optical axis of incident beam after breaking unit is combined in a point F (focal point), while it with the obliquely incident beam OH parallel beams not have any definite focal point.

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Size: 2363px × 2115px
Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
Model Released: No

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