什么是推镜头（push in）？ 急摇运镜 (whip pan)？ 旋转运镜 (camera roll)？ 什么是希区科克（dolly zoom）? 滑动变焦 dolly zoom 借助不同焦段的视野广度不同， 平滑变焦 的同时前后移动使得被摄物体始终在屏幕上的大小一致，而背景由于视角变化，会扩张或收缩，给人以不同的感.
Dolly Parton Shares Throwback Photo Of Herself Without A Wig
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