Scientists from the UK’s National Oceanography Centre were using the famous Boaty McBoatface to test their underwater robotics in the loch.
The team discovered a camera trap that had been lost by Nessie hunters in the 1970s.
The clockwork-operated Kodak Instamatic used four flash bulbs to take four pictures, which could be developed at the bottom of the loch due to the constant low temperature.
Although some of the images were recovered, none contained a shot of the Loch Ness Monster.
The Loch Ness Project is the hub for all things Nessie-related, and although they have links with the camera they do not feature it on their website.
Tourism is a major draw in the area, with Nessie hunters and their pseudoscientific methods adding to the appeal.