Cecil Knowlton owned and operated a photo studio, Knowlton’s Photography, starting on Central Avenue in Dunkirk, then  at 152  East Fourth Street in Dunkirk, and finally in the D&F Plaza (from 1974 to hid retirement in 1977) . He operated the studio for 54 years, selling photo products and developing and printing film. He also photographed various scenes around the city, including aerial shots.