Captured Light: The Invention of Photography

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Across
  1. 2. : Camera-less image made by placing objects on paper.
  2. 4. : Lens opening that controls light.
  3. 5. : Curved glass that focuses light.
  4. 8. : Brand that brought snapshot photography to the masses.
  5. 9. : Inventor of the calotype process.
  6. 10. : Iron-based 'blueprint' process.
  7. 14. : Wet plate process requiring fast darkroom work.
  8. 15. : Partner of Niepce, famous for 1839 process.
  9. 16. : Mechanism that controls exposure time.
  10. 17. : Affordable camera introduced in 1900.
  11. 18. : Made the first permanent photo.
  12. 19. : First woman to publish a photo book (plants).
Down
  1. 1. : Highly detailed photo on silvered copper plate.
  2. 3. : Entrepreneur who popularized roll film.
  3. 6. : Early experimenter with chemicals and light.
  4. 7. : Invention that let photos appear in newspapers.
  5. 10. : Early device meaning 'dark room' in Latin.
  6. 11. : Material coating film or paper with light-sensitive chemicals.
  7. 12. : German scientist who showed silver salts darken in light.
  8. 13. : Flexible film that replaced bulky plates.