Traditional Culture Encyclopedia - Photography and portraiture - [SLR photography skills] Does the light ratio affect the definition?

[SLR photography skills] Does the light ratio affect the definition?

The impact on clarity is not too great. But the noise problem may really have an impact.

If the light is measured in the dark, and the iso is set to automatic, the camera may increase the iso to make the exposure accurate, because the light is too dark, which will lead to high iso and increased noise.