How to use auto, s, a, m and p files accurately?

Let's take a concrete look at the differences and characteristics of different documents. First of all, the automatic file auto is a completely automatic file. When shooting, in the default mode, auto will automatically adjust the white balance, and Auto will also give the shutter and aperture according to the built-in exposure meter. You don't need to do any debugging, just take a photo and press the shutter. Second, the S file S file is the shutter speed priority mode. Shutter speed priority mode means that you can decide the shutter value yourself, and the camera's metering system will measure the light according to the shutter value you choose, and then give the appropriate aperture value. In the S file, you can adjust the white balance, exposure compensation, metering mode, etc. You can only adjust the speed, not the aperture. Generally, this mode is used for constant-speed photography or sports photography. However, it should be noted that there will be aperture overflow in the S file, that is, the shutter will exceed the maximum aperture at high speed or the minimum aperture at low speed. Therefore, when using the S file, it is necessary to control the effective values of the high-speed shutter and the low-speed shutter. Third, a file A file refers to the aperture priority mode. When you are in position A, it means that you can decide the aperture value by yourself. The camera's metering system will measure light according to the aperture value you choose, and then give you a shutter value to ensure correct exposure. In the range of A, all you can adjust is the aperture. Aperture priority can control the depth of field well, and you can also control the shutter speed with aperture. Be careful when the shutter overflows in the first gear, that is, the shutter speed is too fast at a large aperture. If this happens, don't be afraid, because once the shutter speed exceeds the rated speed of the camera, the camera will give a prompt. Fourth, M gear M gear is a full manual gear. In full manual touch mode, you have full discretion to decide the aperture and shutter value. But most cameras will measure light according to your focus, and provide a display to let you know whether there is any shortage/excess, and how many levels, so as to help you choose a suitable one? ス楹楹楹 t? In M mode, most cameras turn off the built-in exposure meter. If there is no external exposure meter at this time, it will easily lead to underexposure or overexposure, so don't use this mode easily, except in some extreme cases. The V. P file p is a programming mode and an open program. In fact, it is a simple combination of A file and S file. In this mode, the camera will also use its metering system to measure light according to your focus, and then give the aperture shutter combination. But the difference is that if the metering is correct, you can choose to change another set of aperture shutter combination, which will still be suitable. What? You just need to choose a suitable one from the middle with the dial. In this mode, we don't have to consider the overflow problem. In addition, within the range of P, the white balance, exposure compensation and metering mode can still be adjusted, and other aspects are the same as A/S..