Goldwater was an amateur photographer and in his estate left some 15,000 of his images to three Arizona institutions. He was very keen on candid photography. He got started in photography after receiving a camera as a gift from his wife on their first Christmas together. He was known to use a 4×5 Graflex, Rolleiflex, 16 mm Bell and Howell motion picture camera, and 35 mm Nikkormat FT. He was a member of the Royal Photographic Society from 1941 becoming a Life Member in 1948.