What affects photographic exposure?

Some factors affecting photo exposure:

1. Some environmental factors: different seasons, shooting locations, environments and bright shooting backgrounds will all affect exposure value.

2. After using the film with special sensitivity, exposure value did not correct it in time;

3. Reciprocal exchange rate is invalid. Sometimes the film emulsion receives too much or too little light, and the exposure time is too long or too short, and the same exposure cannot produce the same photographic effect.

4. The use range of photographic equipment exceeds the limit.

5. Using flash as lighting source, exposure value is not calculated correctly according to the index of the lamp.

6. When shooting, a color filter is added to the lens, but the exposure value is not increased accordingly, which will also lead to underexposure.

7. The roughness, smoothness and color of the surface texture of the object will affect the ability of the object to absorb and reflect light.