This first-of-five images was two stops underexposed, and doesn't yet show the UFO.

In this second-of-five images, the UFO is still not visible in this second-of-five images. This image is one stop-underexposed in a sequence that snapped five pictures within one second.

In this normal exposure image, suddenly an unknown object appears in the sky above the castle.

In this image, the contrast and gray scale settings of the original exposures have been adjusted to further clarify the unexplained object

Because the UFO can barely be seen on the left side just entering the frame, adjustments were made in the contrast to bring more clarity to it in the next slide.

This monochrome version of the preceding slide, with blacks and shadows maximized to bring out details in the image, shows the UFO more clearly on the far left of the screen

This slide shows two enlargements of the object that appeared at the extreme left side of the five-image sequence.

This is an overexposed, final shot of the five-image, one-second exposure of the unusual aerial object above the Muiderslot Castle.

In this image which was the second-of-five, the red circle surrounds another object.

Ben Hansen, lead investigator of the Syfy Channel's "Fact or Fake: Paranormal Files," while he studied the entire five-image sequence that were taken in the span of one second. Hansen asserts that the alleged UFOs in these images were probably insects.