"Constant is a journey through the social and political histories of measurement. The film explores three shifts in the history of measurement standardization, from the land surveying that drove Early Modern European land privatization, to the French Revolution that drove the Metric Revolution, to the conceptual dematerialisation of measurement in the contemporary era of Big Science. Each chapter traces the relationship of measurement standardization to ideas of egalitarianism, agency, justice, and power.” (Sasha Litvintseva & Beny Wagner)

"Constant is a journey through the social and political histories of measurement. The film explores three shifts in the history of measurement standardization, from the land surveying that drove Early Modern European land privatization, to the French Revolution that drove the Metric Revolution, to the conceptual dematerialisation of measurement in the contemporary era of Big Science. Each chapter traces the relationship of measurement standardization to ideas of egalitarianism, agency, justice, and power.” (Sasha Litvintseva & Beny Wagner)

《普朗克常数》是一部由金材昱主演、赵成圭导演执导的电影，片名是一个物理名词，影片以平行空间为主题。金材昱对于影片充满期待，他表示：“我觉得这是一部现在这个时代的年轻人都能有同感的电影，没有可以靠的地方，大家过的都很艰难。我在读到剧本的时候也受到安慰。为了能让好的作品问世，我也会尽自己最大的努力。”