Also helpful to me was a discussion of the depth of field preview button, something I had long ignored.

里面关于景深预览按钮的叙述给了我很大帮助，这点我之前一直没注意到。

youdao

Here you can see the preview. All the red-highlighted sequences in this video are time marks for playing with depth of field.

接下来你可以看到预览小样。视频中所有用红色标出的序列就是景深镜头运用的时刻。

youdao