Abstract: A cassette for releasably holding a photosensitive film unit and locating the film unit at a film plane therein. The cassette includes base and cover sections coupled together in telescoping relation for movement toward and away from each other between releasably latched first and second closed positions. In the first closed position there is minimal pressure applied to the film unit to facilitate its removal from the cassette. When the case and cover sections are located in the second closed position sufficient pressure is applied to the film unit to urge it into intimate contact with a film plane defining bearing surface in the base section. In the illustrated embodiment the cassette is configured for radiographic applications and includes an intensifying screen that is urged into intimate contact with the film unit when the base and cover sections are located in the second closed positions.