back focal distance
常见例句
- Each shot, he should be back three cameras, the focus of the camera as follows: the distance of 10 meters of their location, with 100 mm zoom lens, focal length 100;
每次拍攝時，他都要背上三台相機，各台相機的焦點確定爲：距自己所処位置10米遠的，用100毫米變焦鏡頭，焦距100；
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