History of the Camera

A camera takes an average of 25 frames per second. The images change so quickly that the brain does not have time to register separately: this is the phenomenon of persistence of vision. The cameras record images over long strips of photographic film and the film is developed in the same way as a camera.For us "simplify" the spot, we decided to explain the operation of a camera since the mechanism is quite similar to that of a camera.
When the illuminated image object enters through a small hole in a very dark room, and the white paper is placed some distance from the hole, the dark side, you can see on paper all objects with their own shapes and colors, but in reverse.This occurs through the intersection of the light rays.This description of the camera obscura was given in the 16th century by Leonardo da Vinci. The use of the camera obscura was widespread in the course of the 17th century. It was mainly used by designers, who calquaient on paper projected through the small hole picture.It was then discovered a chemically sensitive material to light, designed to replace the image by directly receiving and securing permanent paper.It is the French who Niepce invented photography setting for the first time and in a sustainable manner the images. He used a glass plate covered with bitumen of Judea, insoluble in light substance.The oldest known photograph taken by Niepce dates from 1822 and required 8 hours of laying in the sun.
 A wetting agent added to the last wash water used to make the movie totally static (dust may not settle there). For color photographs, the principle is almost the same as the pictures in black and white except that there is no one who is impressed, but three colors blue, red and green (the main primary colors) which brings out over the bathroom, all the possible colors as mixtures.
- A mirror is a smooth, shiny surface that reflects almost all light. Lenses and mirrors have many uses including cameras and telescopes lenses The lenses are designed so that the light passing through them is refracted (deflected) in a particular way. There are two main types: convex and concave. A convex lens having one or both sides while a convex lens has a concave recess or both sides. Depending on how they refract light, the lenses are called converging or diverging.
History and operation of the camera optics A camera takes an average of 25 frames per second. The images change so quickly that the brain does not have time to register separately: this is the phenomenon of persistence of vision. The cameras record images over long strips of photographic film and the film is developed in the same way as a camera. To simplify our task, we have decided to explain the operation of a camera since the mechanism is quite similar to that of a camera.
 - The second bath called the stop bath (10 secs) is composed of acetic acid and the effect of stopping the action of the developer in order not to saturate the areas of low and high lights . - The third bath called fixer min) (usually sodium thiosulphate compound) eliminates grains of silver salt to avoid unrecognized turn further action of light. It then sets the different layers composing the film allowing the final image stabilization which can be exposed to the sun safely again. - The last step is to wash, it takes about 1 hour and totally undercut the photo of the remaining impurities.
 The objective optical system is at the front of the apparatus. It is composed of lenses converge the light rays from the subject and gives the film (the film) placed at the bottom of the unit a reversed image. It can be fixed or interchangeable. Its key feature is its focal length (distance in millimeters between the film of the lens (optical center)), which determines the magnification and field of vision seen through the lens. Longer focal length, the longer lenses are close to the plane on which the image is formed, the larger the field of view is wide