Mark and France, right, their emulsion on a negative, left. A husband-and-wife team is producing their own 1920s-era film, similar to the one Oskar Barnack used, in the “world’s smallest film factory”, which they intend to shoot using a 100-year-old Leica camera. Mark Osterman and France Scully Osterman from Rochester, New York, are film enthusiasts and educators who have managed to scrape together all the necessary items to actually make their own film stock at home — the only people in the world outside of major manufacturers who are doing it. The list of impressive items they have procured includes a film coating machine, a vintage film perforating machine, a slitter, a 1926 Leitz variable enlarger, a rare FIMAN film developing drum, and thousands of feet of blank film stock.…