These are not Ghosts

These pictures were taken on purpose to simulate possible photos of paranormal activity. However they all have mundane origins and illustrate how careful one must be when evaluating potenial photgraphic evidence.

Someone is walking through the frame on a long exposure.

A string from a pull light hanging down in front of the lens

Same string catching a little more of the flash.

Same string

Againt the same string. Notice how the distance from the camera and available light can change the appearance

This is a flashlight shadow

This is a finger in front of the lens

These are dust orbs that have been caught by the flash.

This is an investigators breath in the cold. This is why when it's cold outside you should always hold your breath when taking photgraphs. Cigarette smoke looks much the same, which is why you shouldn't smoke while on an investigation.

Dust orbs that are very close to the camera.