How did photography come about?

With the development of science and technology today, photography has become an indispensable and popular entertainment activity in life.

But do you know? All this was simply unimaginable to people in the last century. At that time, if people wanted to leave their own look, they could only rely on the painter's pen.

It has taken a long time for humans to understand the role of light and shadow and to be able to record and reproduce them.

In ancient my country, the level of research in this area was ahead of other countries. As one of the theoretical foundations for the formation and development of modern photography technology, the principle of pinhole imaging was recorded as early as 2,400 years ago in the "Mo Jing", a book written during the Warring States Period in my country. Between 1661 and 1721 AD, my country was able to manufacture painting or viewing camera obscura equipped with imaging lenses. Chen Wenshu of the Qing Dynasty gave a vivid description of this: "A thousand-mile mirror is mounted on a square box cloth mirror, and when the sun shines on it, it can take pictures of scenes several miles away, level with it, and it is as vivid as a picture." At the same time, some people abroad also invented A camera obscura, very close to today's cameras. It can be seen that the development of optical machinery has reached a considerable level in the middle of the 17th century. It was only due to the backwardness of photosensitive chemistry that the development of photography was temporarily stagnant.

In the 18th century, people accidentally discovered the photosensitive properties of silver salt, but failed to connect it with photography. Moreover, the images printed by experiments could not be retained and would disappear soon.

It was not until 1826 that humans combined the camera obscura with chemical photosensitive materials for the first time and truly invented photography. This is the true beginning of the history of photography.