What is a camera obscura? Detailed answer

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What is a camera obscura? Detailed answer

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What is a camera obscura?

In January 1839, the Paris Academy of Sciences heard a report on the discovery by the artist Louis Jacques Mande Daguerre. He proposed a method for developing and fixing an image on a plate coated with silver iodide (daguerreotype). This day can be considered the birthday of photography.

But how did the artist get the image itself? Did the camera already exist by 1839? Imagine there was such a device. It was called "camera obscura" - "dark chamber" in Latin. This invention is very old. In the XNUMXth century BC, a Chinese philosopher talks about him in his work. Aristotle also repeatedly mentions it in his writings.

Here's how it was set up. A small hole was made in one of the walls of the light-tight box. Having set the box with a hole to any object, one could observe its image on the opposite wall. This was due to the light entering through the hole. The image was reduced and inverted, but it could be made larger by changing the distance between the walls of the chamber. If it increased, the image became larger, and vice versa. The picture turned out sharper and brighter if the hole was smaller. As the hole was enlarged, the brightness increased, but the image became blurry.

Author: Cellarius E.Yu.

Random interesting fact from the Great Encyclopedia:

Which writer died of pseudonym cancer?

In the 1970s, American publishers found it undesirable for authors to publish more than one book a year. Stephen King, who wanted to publish more, began to write some works under the pseudonym Richard Bachman. In 1984, a bookstore clerk suspected a similarity in the authors' literary styles and discovered a record in the Library of Congress that King was the author of one of Bachman's novels, notifying King's publishers of his find. The writer himself called this seller and offered to write a revealing article, agreeing to an interview. It resulted in a press release announcing the death of Richard Bachman from "pseudonym cancer".

Test your knowledge! Did you know...

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