for practical purposes, all tlrs are film cameras, most often using 120 film, although there are many examples which used 620 film, 127 film, and 35 mm film. no general-purpose digital tlr cameras exist, since the heyday of tlr cameras ended long before the era of digital cameras. in 2015, mint camera released instantflex tl70, a twin-lens reflex camera that uses fuji instax mini film.