正如我们前面所学，更长的镜头焦距虽然放大了图像，但同样增加了镜头抖动。

The reason for this is that as we know, longer focal length lenses magnify the image, but they also magnify the camera shake.

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测算你相机的安全快门速度有一个好的方法，你相机镜头焦距的倒数，就是你避免镜头抖动的快门最小值。

A good rule of thumb to minimise camera shake is to set the shutter speed at a minimum of one second divided by your focal length.

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那是一次寻常的飞跃大西洋的航班：整整9个小时头不停地在靠垫上移来移去，想枕得舒服些，小屏幕上首轮影片的无声镜头抖动着，多得无法消化的淀粉食物和饮料。

It was the usual transatlantic flight: nine hours of fidgeting to get the pillow right, first-run movies flickering mutely on small screens, an indigestible flow of starchy food and drinks.

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