A fraction with a dimension in inches characterizes the size of the matrix (1/4, 1/3 and 1/2) for photo and video equipment. The higher the size of the matrix, the higher the image quality. It means. That when the camera's matrix is ½ inch, the image on it will be higher quality than those that have ¼ inch.
Cameras for more accurate images of objects in low light conditions are an order of magnitude higher and in price. A significant role in pricing and increasing prices is played by the high cost of the lens.