VISTASCOPE uses the curved reflecting surfaces of prisms to put on the squeeze that fits wide-picture scenes on narrow 16-mm. or 8-mm. movie film. Its light-bouncing sys-tem is shown in optical diagram at right. When the same lens is put on a projector, the distorted image is unsqueezed and projected as a widescreen picture.

FILMORAMA achieves its 16-mm. wide-picture-taking squeeze and wide-screen-projection unsqueeze by refraction, as shown in the optical diagram at right. Instead of being reflected, the light rays are compressed for taking, or magnified for projection, as they pass through cylindrical lens elements of the anamorphic attachment.