Henry Fox Talbot published his first article in 1835. it showed his first discovery of paper negative. He published a book with photographic illustrations and it was called The Pencil of Nature. Talbot developed the calotype process in 1840. He obtained a patent for the calotype process. His process improved the daguerreotype process. His process involved the use of photographic negative which multiple prints could be made. The method of converting a negative to a positive is the basis for modern photography. He is considered to be one of the two founders of photography.
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