Optical printing ratios for enlargement and reduction of motion - picture film images - specification 电影影片画幅放大或缩小光学印片比率技术要求
2.
Cinematography - common to more than one film gauge - printing - specification for optical printing ratios for enlargement and reduction of motion - picture film images 电影技术.第5部分:多种胶片宽度的通用部分.第5节:印片.第1小节:胶片画面放大和缩小的光学印片比率规范
