Photography

aperture: simply speaking, it is the amount of light that enters the negative or CCD instantly. For example, like a faucet, it controls the amount of water.

shutter: simply speaking, it is the length of time that the light shines on the negative or CCD. Just like when we use a faucet, the time from opening to closing.

depth of field: simply speaking, it is the range that can be kept clear when imaging. Generally speaking, the smaller the aperture, the greater the depth of field, and the larger the aperture, the shallower the depth of field.

exposure: simply speaking, it is the process that light enters the camera, making the negative film produce chemical reaction, or making the CCD produce photoelectric conversion.

ISO: that is, the sensitivity, simply speaking, is the sensitivity of negative film or CCD to light. The higher the value, the easier it is to image, but the worse the quality.

exposure compensation: because the light measurement of the camera is sometimes wrong during automatic shooting, we make up for it through exposure compensation. For example, when shooting snow, the camera will think that the object is very bright, so it will be underexposed and gray. At this time, we will increase the exposure through exposure compensation, and the shot will be as white and bright as the real one.

basically, photography is based on the above variables. For the normal exposure of the same scene, aperture, shutter and ISO interact with each other. For example, if you put a basin of water, you can turn up the tap, so that the running time is shorter; You can also turn down the tap and let the running water last longer. Similarly, the exposure is the same. The larger the aperture, the shorter the shutter. The smaller the aperture, the longer the shutter time.

There are many things about these theories on the Internet, so I won't say much. I hope it will inspire you a little ~ ~ ~