Will there be photos of Qianlong period?

There will be no photos during the Qianlong period.

1826, French scientist Joseph Nipps invented the photo. After the Opium War, photography was introduced to China through missionary work, business, medical treatment and military aggression. 1844, the Governor-General of Guangdong and Guangxi and the Minister of Trade and Industry of Five Ports should present his portrait photos to the officials of Britain, the United States, Italy and Portugal as a courtesy when negotiating with France in Macao. Qianlong period is from 1736 to 1795, so there will be no photos of Qianlong period.

Extended data:

After centuries of development in chemistry and optics, the invention of pinhole camera provided a good opportunity for the appearance of the first photo in the world. 1826, the French scientist Joseph Nieps took the world's first photo at home, entitled "The View from the Window of Legolas". This photo shows the courtyard and outhouse outside the window upstairs of his house. The shooting method is exposed on the asphalt metal plate in the pinhole camera.

Usually, the specifications of photos are expressed in inches, which is different from the diagonal length of products such as monitors. "A few inches" in the photo refers to the length of inches on the long side of the photo. For example, a 6-inch photo is a 6×4-inch photo. There is also a commonly used method to indicate the size of a photo in the world, which is to take the integer value of the short side of the photo and add the letter R to indicate it. For example, a 6-inch photo, the specification is 6×4 inches, which is 4R.

References:

Baidu Encyclopedia _ Pictures