What animal could photographers use as a light meter before its invention? Detailed answer

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What animal could photographers use as a light meter before its invention? Detailed answer

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What animal could photographers use as a light meter before its invention?

One of the pioneers of artistic photography, Oskar Gustav Rejlander, who was born in Sweden and lived in England, came up with the idea of using his cat to determine the lighting in the studio before the light meter was invented. If the cat's pupils became like narrow slits, Rejlander set a short shutter speed, and if they expanded more than usual, then the photographer made the shutter speed longer.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Why do photographers say: A bird will fly out now !?

Previously, in order for all the children in a group photo to look into the lens, photographers said: "Look here! A bird will fly out!" This bird was quite real at the beginning of the era of mass photography - though not alive, but brass. In those days, cameras were far from perfect, and in order to get a good picture, people had to freeze in one position for several seconds. In order to attract the attention of restless children, the photographer's assistant at the right moment raised a brilliant "bird", which, moreover, already knew how to make trills.

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Harm of burnt food 26.03.2023

Products after cooking may be slightly burnt. It is in this crust that danger lurks.

Burnt food was studied by scientists from Stockholm University. At the same time, they began their research in 2002. For more than 20 years, they have collected enough information confirming the fact that such food is dangerous.

Any chef will tell you that one of the main requirements in cooking is to observe the temperature regime. And it's not just about taste. For example, foods such as potatoes or bread, when heated to 120 degrees, begin to brown. This is the reaction in which acrylamide appears in the products. It is this substance that is the most dangerous carcinogen.

Fatima Saleh, Associate Professor at the Department of Medical Laboratory Sciences at the University of Beirut, says that many diseases have been linked to acrylamides. It can cause cancer and dementia. It also weakens the natural immunity of a person, which makes him vulnerable to various pathogens. Scientists believe that acrylamide is one of the factors in the development of breast cancer in women.

Another danger of acrylamide is that it is not excreted from the body, does not disengage, but gradually accumulates. Subsequently, the higher its concentration, the more harm the body receives. In fact, it is a slow poison that gradually kills a person.

Therefore, doctors advise avoiding fried crust and burnt food. It is better to remove such a crust, rather than eat it. Even if you really love such food, remember that it can be deadly. It does more harm than good. The food industry is already taking the first steps towards reducing acrylamide in food.

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