从《流浪地球2》谈数字电影超大画幅变形宽银幕技术在国内的成功应用

A discussion towards the successful application of large format anamorphic wildsceen system in Wandering Earth 2

诞生于上世纪50年代的70mm变形宽银幕技术,在《流浪地球2》中以数字电影的形式重新回归观众视野,昔日胶片电影史中2.76∶1的经典画幅比例,在中国电影史上进行了首次尝试。本文致力于梳理70mm变形宽银幕的发展历史和技术原理,从胶片电影演进到数字电影,以《流浪地球2》为例,从数字底片、变形宽银幕镜头和放映形式三个方面详细阐述了该技术的数字化应用,力图探究超大画幅变形宽银幕的技术前景和未来发展趋势。

MGM Camera 65/Ultra Panavision 70,manufactured in the 1950s,has returned to the audience's view as ap-plied to digital film in Wandering Earth 2.The classic aspect ratio in the era of film,2.76∶1 has its debut of China’s film his-tory.This paper is dedicated to combing the history of the development of MGM Camera 65/Ultra Panavision 70 and techni-cal principles,derived from film to digital,taking Wandering Earth 2 as an example,thoroughly expounds the digital applica-tion of this technology from the digital Sensor,anamorphic lenses and the projection form,in order to explore the techno-logical prospects of large format anamorphic wildsceen system and the development trend in the future.