Abstract: A mount for holding a photographic film transparency. The transparency is mounted on a pair of rail sections adhering to its edge portions. The rails are receivable in opposed slots in a frame whereby the transparency bridges a picture aperture in the frame. Stop means on the sides of the frame transverse to the slots prevents the transparency from sliding along the slots. Apparatus for adhering a strip of the transparencies to severable lengths of the rails comprises a channel to receive the strip and having grooves to receive the rails, and a roller movable along the channel with raised rings to run along the rails in the grooves.