Do you know when the first photo in the world was taken? What did you eat?

The common functions in cameras now are actually unimaginable at first. According to historical records, the first photograph in human history was taken by the French inventor Joseph Nieps in his hometown of Legolas, and the shooting time was 1826. Nieps named it "the window of Le Gras", which means "you can leave good memories without hand painting".

The principle is as follows: Nieps has learned some basic knowledge of geometry and physics, and his camera imaging process is similar to the black box principle. Take photos with a big box of asphalt-coated tin foil paper board. After exposure for about 8 hours, the asphalt at the exposure position will harden, and then it will be cleaned with petroleum and lavender oil, and an image will appear. From the present point of view, Nieps's works are almost like being shot on a roller coaster at night with a 300,000-pixel camera phone. However, it is still the first photo in human history-the real world first.

Nieps's invention didn't get the attention of the Royal Society at first, thinking that it was just a creative work under the sun. Bureaucrats finally gave the photos to botanists, and Nieps missed the chance to become famous.

About 50 years later, under the tracing of historian Helmut Gernsheim, this painting "Window At Le Gras" reappeared and was first exhibited in London in 1898. In September this year, this veteran photographer will meet the world again at the Mannheim Museum in Germany, telling people the history before 186.