It allows us to preserve and retain the precious moments for years together. So how does a camera preserve and capture our beautiful memories? Here is a look at the basic functions and working of a camera.
With the technological revolution, cameras have come a long way from the "camera obscura" or the "dark chamber" cameras in the 1900s. However, the basic functioning of the camera remains the same. So every camera essentially is a lightproof box encasing three elements, the mechanical, chemical (the film), and the optical element or the lens.
So the speed of light would vary when it travels in air than when it travels through a glass medium. When you focus your camera on an object, the light bounces of it, and strikes the glass or plastic lens. This slows down the speed of light and allows the rays to bend as they enter the lens.
As the light rays diverge from the source, the lens allow the rays to converge on a single point where the image can be formed. Commonly known as the film surface of a camera, this light-sensitive material records the image. Later when processed with certain chemicals, the image is visible.
Along with this basic structure, a manual camera may also contain an aperture control, a diaphragm that regulates the amount of light that enters a lens, and shutter just before the light sensor. The function of the shutter is to expose the light sensor to a consistent amount of light.
The shutter speed or rather the time that the shutters are left open, is how photographers control picture quality and certain effects such as the picture of a moving object with the blurring.