Hurter and Driffield

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H & D curve used in sensitometry
H & D curve used in sensitometry


Ferdinand Hurter (1844–1898) and Vero Charles Driffield (1848–1915) were nineteenth-century photographic scientists who brought quantitative scientific practice to photography through the methods of sensitometry and densitometry.

Hurter & Driffield's actinograph.
Hurter & Driffield's actinograph.

Among their other innovations was a photographic exposure estimation device known as an actinograph.[1]

[edit] References

  1. ^ W.B. Ferguson (editor) (1920). The Photographic Researches of Ferdinand Hurter & Vero C. Driffield: Being a Reprint of Their Published Papers, Together With a History of Their Early Work & a Bibliography of Later Work on the Same Subject. London: Royal Photographic Society of Great Britain. 
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