defocusing coefficient

例句：

1. 1.The camera was set up with a defocusing coefficient of 0.5.
   相机的对焦系数设定为0.5。
2. 2. The scientist used the defocusing coefficient to adjust the focus of the lens.
   科学家使用失焦系数来调整镜头的焦点。
3. 3.The defocusing coefficient is an important factor in determining the sharpness of an image.
   失焦系数是决定图像清晰度的一个重要因素。