Excuse me, why is the size of the photosensitive element of a professional camera so small? (from structural explanation)

One is the cost. Professional cameras generally use 3CCD imaging system, but CCD has low yield and high production cost!

One is the volume problem. Professional cameras generally use 1/3 or 2/3 inch 3CCD imaging system. If the area of a single imaging element reaches, the whole machine will be too big!

One is the problem of processing capacity. At present, the development of cameras and camera image processors lags far behind the development of imaging element pixels. The camera needs to process a lot of data in a short time. The imaging element area is too large, the pixels are too high, and the code stream is too high, so the processing speed of the processor can't keep up!