Fremont Davis, 61, a photographer and lecturer at the University of Maryland, died Saturday at Leland Memorial Hospital after a heart attack.

A lecturer in the department of housing and applied science of the College of Human Ecology at the university since 1944, he had taught basic and advanced courses in photography on a full-time basis since 1968.

Mr. Davis also had been a staff photographer for Science Service from 1935 to 1968. It publishes Science News and Things in Science and sponsors youth activities such as science clubs and science fairs.

He had written stories illustrated with his photographs for those publications and had received on Outstanding Science Picture of the Year Award from Editor and Publisher.

Mr. Davis' photographs had hung in international exhibitions in this country and abroad. George Washington University presented a one-man show of his dance photographs of the Modern Dance Group at the university and the Dance Playhouse group.

He had been president and was an active member for many years of the D.C. Radio Control Club. He did a number of picture stories on radio control planes for Model Airplane News, Model Aviation and American Modeler. His photographs also had appeared in numerous other publications. Mr. Davis was a member of the Society for Photographic Education and the American Association of University Professors.

Born in Washington, he attended George Washington University. In World War II, he was a photographer at the Army War College.

He is survived by his wife, Shirley, of the home in University Park; two sons, Parker, of Topsham, Maine, and Gary, of New York City; a sister, Evelyn, of Herndon, and four grandchildren.