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Camera Obscura

The first mention of the сamera-obscure occurs in the 5th century BC.
A camera obscure refers to an optical device that is a light-tight box. On the one hand its hole, on the other the screen. When the beam passes through the hole of light, the object is detected by the opposite wall in relation to the hole in an inverted and reduced form.
This optical technique was often used by artists when drawing a sketch with the necessary landscape or object.
The first optical equipment for creating art canvases was created by the great master Leonardo da Vinci. Its description can be read in the "Treatise on Painting", where the author adheres to a strict view of the operation of an optical device. Leonardo da Vinci wrote that the objects displayed on a paper sheet are transmitted not only in their real forms, but also in the same colors.It is noteworthy that in search of improvements, an optical camera was made in the form of a tetrahedral pyramid. Unlike boxes, the device was based on 4 rails, which were connected at the top with couplings. The camera screen became a white background, on which special fixing reagents were subsequently applied.
The method of obtaining images in a camera obscura developed by 1839 and was called daguerreotype.
In fact, all modern cameras are an improved version of the original invention :)