放大倍率变大的原因就在于此。原先10cm处的较宽范围的景物的都要成像在胶片上,现在5cm处较窄范围景物都要成像在胶片上。所以增大了放大倍率。
特写画面:画面的下边框在成人肩部以上的头像,或其他被摄对象的局部称为特写镜头。特写镜头被摄对象充满画面,比近景更加接近观众。
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