What's the difference between the sensitivity of digital cameras and that of exposure value?

The difference between digital camera sensitivity and exposure value;

1, different uses:

Sensitivity, also known as ISO value, is a measure of the sensitivity of negative film to light, which is determined by the measurement of sensitivity and several values, and has recently been standardized by the International Organization for Standardization. Sensitivity, also known as ISO value, is a measure of the sensitivity of negative film to light, which is determined by the measurement of sensitivity and several values, and has recently been standardized by the International Organization for Standardization.

2, the application effect is different:

The influence of sensitivity on photography is manifested in two aspects. One is speed. Higher sensitivity can get faster shutter speed and be easier to understand. The second is image quality. The lower the sensitivity, the finer the image quality, the higher the sensitivity and the higher the noise.

The increase of exposure value corresponds to a faster shutter speed and a larger F value. Therefore, a bright environment or a higher sensitivity (commonly known as ISO) should correspond to a larger exposure value.

Extended data:

Sensitivity level application:

1, low sensitivity:

The sensitivity below ISO800(20 17) is low, and extremely smooth and delicate photos can be obtained in this part. 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 by one level than to improve the sensitivity by one level.

2, 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. ?

3, high sensitivity:

The network above O6400(20 17) is highly sensitive, and the noise in this section is obvious. With this setting, the importance of the theme content 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.

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