It's mainly focusing on composition, and getting the most out of the camera.
（课程）主要讲的是构图，怎样充分利用最基本的相机功能。
2
The closest focusing distance for most cameras is about three feet, or about one step away from your camera.
大多数相机的最近焦点距离大约是三英尺，或者是离相机大约一步远。
3
If you get closer than the closest focusing distance of your camera (see your manual to be sure), your pictures will be blurry. Move it from the middle.