What's the difference between Quan Huafu and the remnant?

The sensor area of Quan Huafu is 24mmX36mm, which is the same as the negative area of 135 film. According to the usage habit, there is no need to multiply the focal length coefficient when using the lens. The afterimages are mainly APS-C, APS-H and APS-P, and the area of photosensitive element in APS-C format is about 25mmX 17mm. It is almost half the area of Quan Huafu CCD(CMOS), also known as the half frame machine, and it is the most used frame in the residual frame SLR camera. The frame area of APS-H is about 30.3× 16.6mm, and there are few users. It has been used by Canon's professional sports machine before, and its focal length coefficient is 1.3. The APS-P mode is called panoramic mode, and it blocks one from the upper and lower sides of Quan Huafu, so that the aspect ratio of the picture is 3: 1. It is not widely used in digital cameras, but it is used in movie cameras. There is also a 4/3 frame, also called m43 frame, whose area is the smallest in the SLR residual image, and it is17.3x13mm, which is about 1/4 in Quan Huafu, and the equivalent conversion coefficient of 135 is 2.

Under the same pixel condition of digital camera, the larger the sensor area, the higher the signal-to-noise ratio, the better the imaging quality and the better the high sensitivity performance. On the other hand, if you use a smaller high pixel sensor, the picture quality will definitely not be good. But then again, it is still difficult to see much difference in general use under good lighting conditions, just like some mobile phones take pictures very well.