什么是感光度? 答:胶片对光线敏感的程度叫做底片的感光度。 什么叫密度? 答:胶片感光后,底片颗粒形成粗、细的变化程度叫做底片的密度。 什么叫反差? 答:胶片感光后,在胶片上形成明暗对比差叫做底片的反差。 什么叫宽容度? 答:宽容度是胶片按正比关系,正确记录景物的亮 What is the sensitivity? A: The degree of light sensitive film is called the sensitivity of the film. What is the density? A: After film exposure, the film particles coarse, fine changes called the density of the film. What is the contrast? A: The film after the light, the film formed on the contrast between light and dark contrast called the negatives. What is tolerance? A: tolerance is proportional to the film, the correct record of the bright scenery