Wide angle film shooting and projection of truncated images

Process of wide angle film shooting and subsequent projection of images onto a concave screen essentially in the form of a spherical dome comprising

• forming on the film, for projection, a series of closely adjacent truncated circular images having their truncations oriented longitudinally of the length of the film and all located near a common side of the film which corresponds to an upper portion of the image to be projected onto the screen,
• said forming of said images on the film comprising
• shooting a scene on film using an incline objective of the "fish-eye" type having a wide aperture angular field as great as 220.degree. and which provides progressive linear compression of the image towards its periphery,
• projecting said images formed on the film onto said screen through a tele-objective and a convex mirror positioned in the center of said screen and having its axis of symmetry inclined at the same angle as said objective used to shoot the scene, and adapated to the screen, said step of projecting said images comprising orienting said film so that the side of the film adjacent the truncations corresponds to the upper portion of the image projected on the screen and moving the so oriented film horizontally,
• locating the tele-objective, during projection, at a distance from said convex mirror to enable the real image of each point of a film image to coincide with a corresponding point of the incurved virtual image formed on said screen by said convex mirror,
• and compensating for aberrations caused by the said mirror at edges of said screen so as to produce on said screen a faithful image of the perspective of the scene.