What is camera IOS?

In digital cameras, ISO stands for the photosensitive speed of CCD or CMOS photosensitive elements. The higher the ISO value, the stronger the photosensitivity of photosensitive components. The calculation formula of ISO is H*S=0.8(S sensitivity, h is exposure). As can be seen from the formula, the higher the sensitivity, the lower the requirements for exposure. Deformation formula: H=0.8/s, under the same exposure, the exposure time at iso50 is twice as long as that at iso 100. Commonly used iso values are 50, 100, 200, 400, 1000, etc.

Generally speaking, the lower the iso value, the higher the photo quality and the finer the photo details. The higher the iso value, the higher the brightness of the photo, and the quality of the photo will decline with the increase of iso value, and the noise will become more and more serious, but the high iso value can make up for the lack of light.