Why do ancient cameras get angry when they take pictures?

What we see is basically to increase exposure with flash powder, because the main raw material is magnesium powder, so we will see a lot of flash and smoke. This is the development of glitter.

1In February, 864, the photo of Edward Sonstadt in a darkroom with burning magnesium wire as light source and exposure time of 1/50 seconds caused a sensation in the photography circle at that time. Although it was expensive, magnesium wire quickly became the first choice for photographers, and it was very popular in11970 s and 1980 s. Photographers at that time wound magnesium wire around a metal rod and added a bowl-shaped metal reflector behind the metal rod to control the direction of light, so the earliest magnesium light was born. Later, a spring-driven magnesium wire lamp was designed. There is a metal tube in the center of the reflector. Magnesium wire is sent out of the metal tube through clockwork and gear, and the photographer lights it with a match or lighter. Soon magnesium wire was exposed, and it was difficult for photographers to grasp the exposure effect because of the unstable brightness caused by insufficient combustion. Moreover, magnesium wire will produce a lot of smoke, ash and pungent smell when burning, which is not suitable for indoor use. To this end, some people try to grind magnesium wires or strips into magnesium powder to make the combustion more uniform and faster. Because the surface area of magnesium powder with the same weight is larger than that of magnesium wire, the burning process is fierce and short, which makes the photographer really get the effect of "flash", and the earliest flash lamp was born. The attempt was successful, and the photographer could control the exposure by adjusting the amount of magnesium powder. It is said that photographers at that time would weigh out different amounts of magnesium powder with scales and put them into small bags to carry with them. However, due to the flammable and explosive characteristics of magnesium metal, many photographers died in the process of grinding or using. 1887, Dr. Adolf Miete [German astronomer, physicist and chemist, pioneer of astrophotography] and Johannes Gaedicke mixed potassium chlorate [a strong oxidant] with magnesium powder to invent magnesium powder gunpowder, also known as flash powder, which was the earliest flash powder. The burning speed of magnesium powder is very fast, and it can burst into extremely strong light in an instant. Adolf Miethe and Johannes Gaedicke named their products "Blitz licht" and put them on the market, which was warmly welcomed by photographers. Blitz licht is the first widely used flash powder, which enables photographers to capture high-speed moving objects or shoot in dark environment, greatly broadening the subject matter of photography. For the convenience of quick use, the Blitz licht is wrapped in a bullet-shaped copper shell, and the handle of the magnesium powder lamp has a chute similar to a gun chamber, which can accommodate 2~3 Blitzlichts at a time. The photographer pushed Blitz licht to the top of the handle through the lever on the handle, and then lit it with a lighter flint. This design of quick replacement of magnesium powder was very popular at that time. The birth of flash powder is a milestone in the history of flash development. Until the end of the 1920s, for more than 40 years, flash powder has been the most dependent flash means for photographers. Even in the 1940s, some photographers still used flash powder.