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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Hurter and Driffield ： ウィキペディア英語版 Hurter and Driffield 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. Among their other innovations was a photographic exposure estimation device known as an actinograph. ==See also== *H&D speed numbers, originally described in 1890, for film speed measurements 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hurter and Driffield」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.