Before taking photos, we will briefly introduce the basic techniques of photo-taking. This activity is about exposure compensation (EV). 

Exposure is the amount of light captured by the camera in each shot. The exposure compensation adjustment on the camera allows users to generally manage all the settings related to exposure (such as the combination of aperture size and shutter speed). This alters the amount of light captured by the camera.

The higher the EV (e.g. EV+3), the more exposure is needed so that the photos are not too dark.

The lower the EV (e.g. EV-3), the less exposure is needed so that the photos are not too bright.

Standards for Exploring effects: Exposure compensation (EV)