natural focus

例句：

1. 1. The camera was set up at the perfect natural focus for capturing the scene.
   相机被设置在完美的自然焦点上捕捉场景。
2. 2. The scientist used a microscope to achieve a natural focus on the sample.
   科学家使用显微镜实现了对样本的自然聚焦。
3. 3.The photographer focused his lens on the distant mountain to achieve a natural focus.
   摄影师将镜头对准远处的山峦以实现自然聚焦。