Frank experimented with infrared photography, his best known image a view of Mount Baker. In 1921, he photographed the dedication of the Peace Arch. A favourite subject was the line of Canadian Pacific ships, especially as they entered Vancouver harbour. One photograph, of the steamship Aorangi, was enlarged 82 times, to the giant size of 40 inches by 6 feet. Today, Frank's documentation of shipping is of great value to historians. Noteworthy as well are his panoramic views, providing a record of the evolving skyline of Vancouver.