英语翻译原文:云台安装于三脚架上.它保证了相机转动时,镜头的“节点”正好位于转动轴上.不采用云台而直接使用数码相机和鱼眼
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The panorama head should be FIXED on a tripod, TO ensure the nodal point of the lens FALLS RIGHT on the rotation axis when the camera turns around. Without the panorama head, the PICTURES taken SIMPLY WITH A digital camera and fish-eye lens will migrate (DEVIATE?).

看你还是有一定基础的,就不费事指出怎么修改的了,自己看后整理好了.术语自己查对无误吧,最后一个词严重怀疑,但不知道你说的具体是从哪里偏移,所以我的建议词也不一定对,一般来说要加上from .才完整.