Arcs appear in night photos

After taking a photo, the shutter of your camera has not been closed, but you think the photo has been taken, and the camera shakes

If there is a bright spot in the subject, the bright spot will move along your camera. A line of light and shadow.

Many photography enthusiasts like this kind of light and shadow graffiti.

What they do is to draw in front of the camera with a bright light source at a slow shutter speed in a relatively dark environment.

Picasso did this too~~