What are the factors that affect exposure in photography?

The first is the light source, the strength of which directly affects the exposure degree, followed by the camera. Camera parameters that affect exposure mainly include the size of aperture. The larger the aperture, the more light enters in a certain period of time. Second, the shutter speed, the faster the speed, the less light. There is also ISO, which is the sensitivity of photosensitive elements to light. The higher the sensitivity, the greater the noise.