Deceptive camera straps

For a long time, we thought that we could recognize a camera strap in a 'ghost picture' because it's an obvious loop, and usually on the right side of the camera.

Our experiments this week showed us that a camera strap can appear to be a single line that fades away. It can look like a floating irregular shape. It can even appear as a strange shape that's walking through a solid object.

Here are our reports:

Ghost vortex picture... or camera strap?

Strange shapes and camera straps