What is the camera
The camera performs a task similar to the human eye. From here, scientists have tried to project the functions and parts of the human body onto the devices in our hands. The function of the camera with its parts is similar to the eye, for example, the iris and the lens .. etc. of the parts that are similar in their work to the human eye. The camera receives the image to be captured through the light rays falling on the objects, where it is received through the lens towards the so-called image sensor, which is a chip inside the camera, which converts these incident rays after being refracted through the lens into electrical impulses that are read within processors The internal camera and its output via the video camera output or through a still image in the case of cameras that capture still images.
Lens function
The lens, which is the outer part of the camera, has the function of collecting light as well as focusing the image, as there are cameras that work with auto focus control, and others work on focusing and clarity of the image manually through manual focus through screws located on the sides of the lens that calibrate them According to the appropriate vision, accuracy and appropriate focus, and there is the ability to control the iris of the camera; This is in order to control the amount of light entering the camera, as the greater the amount of light present in the scene to be photographed, the less the area of the iris aperture (similar to the human eye because if you want to enter a place with intense lighting, you try to close the opening of the eye so as not to allow the light to enter this huge amount and vice versa). There are cameras that work to bring the image closer, and they are called Zoom Cameras, and this depends on the camera lens and how much of its focal length is. The greater the focal length of the camera lens, the greater its ability to zoom in and see far places. And the value of the image zoom is known as X. There are cameras 10X, 18X....etc. The value of this number refers to the ability of the camera lens to zoom ten times or eighteen times...etc.
How to measure the clarity of the camera
To measure the clarity of the camera, there is a so-called Resolution, which is the ability of this camera to provide clarity by the number of pixels it contains. Better than that, by knowing the value of the pixels that the captured image or video provides us with from the camera; A 3 mega pixel camera is definitely better than a 2 mega pixel camera; Because the first camera contains 3 million pixels and the second has 2 million pixels, which gives greater clarity to the image by showing more details of the captured image or video.
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