Photography class homework topic?

The answer is: increase exposure on cloudy days and decrease exposure on sunny days.

Exposure: Increase aperture or decrease shutter speed.

Reduce exposure: reduce aperture or increase shutter.

The light on a cloudy day is called diffuse light. The contrast between the highlight and the dark side of light is very small.

Therefore, in order to get the correct exposure film, the light ratio should be artificially increased, so adding a little exposure can make the high-gloss surface light up.

The light on a sunny day is direct light, and there is a great contrast between the highlight and the dark side of the light.

If you shoot the highlights directly, it will definitely be too violent. In order to prevent the high-gloss surface from being exposed too much, you should reduce the exposure and expose the direct sunlight correctly.

As for how much to add or subtract, it depends on the lighting environment at that time.