"The discovery I have made and which I call Heliography, consists in reproducing spontaneously, by the action of light…"——JosephNicéphore Niépce.
我将这次探索的结果称为日光图，在于借着光的作用自发再现……
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The first permanent photograph was made in 1826 by JosephNicéphore Niépce, building on a discovery by Johann Heinrich Schultz (1724): a silver and chalk mixture darkens under exposure to light.