A tech wizard who pioneered slow-motion instant replay in the 1960s and developed the first broadcast-quality hand-held cameras has died, according to The Hollywood Reporter.

Robert Trachinger, who spent 35 years at ABC and won two Emmys, was 86. He experimented in the 1960s with black-and-white slow-motion videotape, and developed the forerunner of today’s electronic news-gathering cameras. His innovations helped ABC Sports become a broadcasting leader, and the National Association of Broadcasters honored him for his work on the development of videotape.

After two years as the director of program development and operations at ABC Sports in New York, he became an executive producer at KABC-TV in Los Angeles in 1966.

He returned to the network and was named vice president of ABC Television in 1978, and later was put in charge of broadcast operations and engineering for the 1984 Summer Olympics in Los Angeles, the story says.