The Oslo District Court found the 46-year-old guilty of aggravated rape, kidnapping and blackmail, reported the Verdens Gang newspaper on Wednesday.
The man must also pay a total of 315,000 Norwegian kroner ($53,000) in damages to his victim, whom he found in bed with his wife in September last year. The husband proceeded to tie the lover to a radiator, and beat him with an axe, bottle and cables. He then raped his victim.
The assailant filmed parts of the 15-hour torture and demanded that the victim pay him 10,000 kroner to ensure the video was not sent to his family.