一直用数字拍片的王兵第一次买了台胶片机玩（16mm的bolex），他用秒表来测试一小盘能拍多久时长。 「Portrait Wang Bing」by Tobi Sauer. A portrait of filmmaker and documenta 14 artist Wang Bing. Wang Bing shot his previous films digitally, for example "15 Hours" which consists of a single 15-hour long shot. In Kassel, he bought his first Bolex (16 mm camera). With a stopwatch, he tests how long he film can film at a time.