Why is the lens of the camera not square
2, due to the need for light through the lens lens into the camera in the film or electronic sensor on the exposure imaging, in order to ensure accurate imaging, the lens lens needs to be processed into spherical or other types of surface, the use of circular structure to facilitate the lens Polished and cut.
1, in order to maximize the amount of light, so that light through the lens, to ensure a clear picture. Such as the design of the side, near the edge of the amount of light and the amount of light through the middle of inconsistent, both strong center, four corners weak, according to the central light exposure, corners of the lack of exposure; by the corners of the light exposure, the central exposure.
