An airline pilot hid a camera in a woman's bedroom without her knowledge.
Martyn Bourner, of Orchard Road in Port Erin, appeared before Deputy High Bailiff Rachael Braidwood at Douglas Courthouse.
The 34-year-old admitted trespass with intent to install a surveillance device in Port St Mary.
Recovered footage showed Bourner entering the bedroom and going through underwear and belongings before committing a sex act on her bed - other footage showed the woman and others.
The case was committed to the Court of General Gaol Delivery for sentencing, and he was bailed on condition he doesn't contact his victim to appear in court again on May 24.
Two more schemes backed by government fund
Island to get Bikesafe scheme for first time
Jurby Junk's Stella dies aged 90
No plans to publish UK's assisted dying letters
Burst water main disrupts Onchan supply
Government advice following spike in data breaches
Plans for four-foot flood walls at Ramsey harbour
Garage blaze in the early hours of this morning