Ask the master for CSM application on SLR. What effect does numerical value have on photography? Need more detailed information.

Now novices buy a SLR and refuse to read the instructions. . . . Go home and read all the instructions.

Briefly

The following are all under the condition that iso is fixed, so it is unnecessary to introduce iso. As the name implies, the higher the value, the brighter it is, and the smaller it is, the more noise it will be. This needs to be chosen by yourself.

Let's clarify several concepts:

The aperture value is inversely proportional to the scale number, and the aperture of f/2 is larger than that of f/8. This is easy to understand. Large aperture leads to large amount of light, while small aperture leads to small amount of light. The larger the aperture, the shallower the depth of field, and the smaller the aperture, the larger the depth of field.

shutter speed, the faster the shutter speed, the less light it will get, and the less likely it will shake off. Because there is less light received, there are relatively few details.

exposure compensation. In file A (aperture priority), the camera will automatically adjust the shutter speed according to the set aperture value and exposure compensation value. In the S file (shutter priority), according to the set shutter value and exposure compensation value, the camera will adjust the aperture size itself.

exposure compensation can't be set for m-gear (manual gear), and the exposure situation is determined according to the shutter value and aperture value that you control manually. In fact, there is a functional relationship here that should be easy to understand, so there is no need to explain it in more detail.

I have a few points to say. The shutter speed should generally not be lower than your focal length. For example, if you use a 5mm lens, the shutter speed should not be lower than 1/5s. The maximum aperture of zoom lens with non-fixed aperture is different when using different focal lengths, which is often asked by novices.

In places with poor relative light, the use of shutter is preferred to ensure that a safe shutter value will not be lost. As for the exposure problem, iso can be improved or adjusted later.

when the light is good, or it is necessary to highlight the theme, use the aperture first, which can effectively control the depth of field. A file is a novice's favorite file, and the effect of photos is good and intuitive.

M file is suitable for shooting scenery or other occasions where you don't have to hurry, and you can adjust it slowly. Of course, the technical level is high, and it is not bad to always use M gear.