Legendary portrait photographer Annie Leibovitz has sold her Manhattan penthouse for a $3 million profit after less than a year of ownership. The off-market sale saw the duplex trade for $19.5 million, according to city records. Leibovitz is best known for her iconic portraits of household names, from John Lennon and Yoko Ono to Queen Elizabeth. The 76-year-old purchased the industrial-style penthouse at 495 West St. just last May from artist Helen Marden. The similarly off-market deal totaled $