Can I control the focal length?

我能控制焦距吗？

Set the focal length on your lens.

给你的镜头设置焦距。

Empty eyes, can not find the focal length.

空洞的眼眸，找不到焦距所在。

The iPhone camera has a fixed focal length.

iPhone的摄像头有焦距固定。

That cone Angle is directly controlled by the focal length.

圆锥角度直接受到焦距的控制。