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 X-ray tube with air-cooled anode (Philips Metalix tube), bottom with water-cooled anode (Philips media metal tube) .Bäckström, Helmer. Photographic manual. Nature and Culture. Stockholm. 1942. p. 862.

---

Size: 2743px × 1822px
Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: