In the early 1900s Ethel Standiford-Mehlingan was an experimental photographer and artist and owner of the Standiford Studio in Louisville, Kentucky. She was commissioned by Louisville artist and art patron Eleanor Belknap Humphrey to create an autochrome diascope of her two oldest children. Both the autochrome photograph of the Humphrey children and the diascope mirror viewing device, which closes into itself in a leather-bound case similar in size and appearance to a book, are well preserved and still viewable in 2015. Ethel Standiford-Mehlingan later moved her Louisville enterprise Standiford Studios to Cleveland, Ohio and it is not known if any other examples of her autochrome diascopes still exist.