Complex sentence: Inventor of the Kodak camera and roll film, and business master, Eastman became a major philanthropist, using some of his wealth to endow the Eastman School of Music at the University of Rochester.
Split into simpler sentences: Inventor of the Kodak camera and roll film, and business master, Eastman had become a major philanthropist. He used some of his great wealth to endow the Eastman School of Music at the University of Rochester.