What is the English value of photographic sensitivity?

Photographic sensitivity is also called ISO value in English.

Sensitivity, also known as ISO value, refers to the sensitivity of photosensitive elements of digital cameras. The higher the sensitivity, the stronger the sensitivity of the photosensitive element. The lower the sensitivity, the lower the sensitivity of the photosensitive element to light.

Sensitivity is directly expressed by numbers, such as100,200,400,800. The smaller the number, the lower the sensitivity, and the larger the number, the higher the sensitivity.

Grade application:

Low sensitivity.

Below ISO800(20 17) is low sensitivity.

In this part, you can get extremely smooth and delicate photos. As long as conditions permit, as long as you can take clear photos, try to use low sensitivity. For example, as long as the depth of field can be guaranteed, it is better to open the aperture one step than to improve the sensitivity one step.

Medium sensitivity.

ф o800 ~ 6400 (2017) belongs to medium sensitivity.

In this part, we need to seriously consider what this photo is used for and to what extent it should be enlarged. If noise can be accepted, the setting of medium sensitivity reduces the difficulty of shooting with hand-held camera, improves the safety factor of shooting in low illumination and improves the success rate.

High sensitivity.

ISO6400(20 17) or above is highly sensitive.

The noise is obvious in this section. With this setting, the importance of the theme usually exceeds the quality of the image. After all, sometimes the shooting conditions are too bad, and it is better to take a slightly poor quality photo than not to take an image at all.