The amount and kind of light needed depend on the effect the film maker is trying to achieve and on the film raw stock he is using. The film maker uses a light meter to measure the intensity of the light on his object or scene.

• 用光和光源取决于拍片人想要获得的效果及使用的胶片。拍片人用测光仪来测试被摄景物的亮度。