IGSS uses a high quality digital SLR still shot camera and a professional series 35MM camera for photography.  IGSS uses a still shot digital camera to capture images to use as referance. Most photos claimed as paranormal can be explained away. There could be things such as dust on the lens or light reflecting in the room, or even something else in front of the lens such as a finger that can distort the image.  Human faces are often seen in ghost photos but are often just an optical illusion as many factors come into play in a photograph.  It’s nice to have a ghostly image in a photograph but still to this day no one can prove a ghostly image in a photograph is 100% real.