Spirit photography has been around since about the mid-1800s, and since its inception, there have been many frauds and hoaxes. Double exposures as well as tricks of light and lens create very interesting images, that's for sure. Digital photography is easy to manipulate, prone to "pixel problems" and therefore not a very reliable source of evidence, sad to say.

Also, people can mistake variations of color and striations in structure as faces or images of an apparition causing the viewer to have to stretch the imagination to "see" what another believes to be an entity on film. Besides these irregularities, many photos can be explained by natural phenomenon. Yet those unexplainable cases are still passed off as other "unknown" phenomenon, and not necessarily that of a ghost.

However, photography is still used to show evidence of what one believes is a spirit and the rest of us delight in scrutinizing them because . . . well, it's just fascinating.