The first known photograph of Niagara Falls, a daguerreotype, is taken by English chemist Hugh Lee Pattinson in 1840.
Pattinson, known in his time for the patent process for refining silver that bears his name, is best remembered for his daguerreotype photographs taken in 1840.
Images
Early Daguerreotype photograph by en:Hugh Lee Pattinson (1796-1858), English metallurgist, believed to be the first ever taken of the Niagara Falls. The image was taken from the Canadian side in 1840, and inverted left-right.