一、什么是标准底片所谓标准底片,就是指曝光和显影得当,具有标准密度和反差的底片。为了得到具有标准密度和反差的底片,摄影时的曝光一定要准确,然后还必须进行标准显影加工。 First, what is the standard film The so-called standard film, refers to the proper exposure and development, with a standard density and contrast of the film. In order to obtain a film with a standard density and contrast, the exposure at the time of photography must be accurate, and then the standard developing process must be performed.