step lens

例句：

1. 1. The photographer carefully adjusted the step lens to capture the perfect shot.
   摄影师小心翼翼地调整镜头，以捕捉完美的画面。
2. 2.The scientist used a step lens to observe the microscopic world.
   科学家使用一个镜头来观察微观世界。
3. 3. The director wanted to show the audience the beauty of nature through the step lens.
   导演想通过镜头展示大自然的美丽。