How to set ISO, shutter speed and aperture will be better?

This question shows that you have already practiced shooting. Let's look at the relationship between the exposure triangle.

ISO, shutter speed and aperture value are called exposure triangle. Both shutter and aperture operate around exposure. When the exposure is large, the film will be very bright, and vice versa. ISO is an inherent characteristic of sensors. If the ISO is large, the sensor is very sensitive to light, but the noise will be amplified, so there is more noise in the image.

ISO is generally set according to the illumination of the scene and two other parameters. For sunny days, it is generally set to the minimum value, such as ISO 100. In dark weather, it is set around ISO 400. The larger the ISO, the more noise there is in the image.

Shutter speed is set according to the safety shutter. Generally speaking, the safety shutter is taken as the reciprocal of the focal length. For example, the focal length is 50MM, and the safety shutter is 1/50S, so the influence of jitter is small.

Aperture setting needs to consider the depth of field effect and its corresponding shutter speed. For scenery, F8~F 16 is generally set, and portraits with blurred background are generally one or two steps higher than the maximum aperture of the lens.

First, you set the camera in aperture priority mode and the exposure compensation is set to 0. Iso setting 100, aperture setting at F5.6 what is a shutter? Take a picture and be careful not to shake your hands.

Then set the aperture at F8, F 1 1 to see if the shutter changes slowly. Well, you already know the relationship between aperture and shutter.

Then fix the aperture at F5.6, set the ISO at ISO 200 and ISO 400, and take a look at the shutter changes to know the relationship between ISO and shutter.

Similarly, look at the relationship between ISO and aperture in shutter priority mode.

I think you already know that there is no fixed ISO, shutter and aperture value that is "effective".