本标准规定了W型摄像机光圈在16mm电影胶片上产生的图像区域的尺寸，用于放大为宽高比为1.66:1或更大的非对称35mm电影胶片。它还指定了图像相对于胶片参考边缘和穿孔的位置。本标准进一步规定了35mm内底片或复制件上放大图像区域的尺寸和位置，以及光学打印中从16mm开始的放大率- W型原稿。

This standard specifies the dimensions of the image area produced by type W camera aperture on 16-mm motion-picture film intended for enlargement to nonanamorphic 35-mm motion- picture film with an aspect ratio of 1.66:1 or greater. It also specifies the position of the image relative to the reference edge of the film and to the perforations.This standard further specifies the dimensions and location of the enlarged image area on 35-mm internegatives or duplicate negatives and the enlargement ratio in optical printing from 16-mm type W originals.