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Each encountered technical difficulties that led them to found a company called 'Multiscreen', with the goal of developing a simpler approach. During Expo 67 in Montreal, the National Film Board of Canada's In the Labyrinth and Ferguson's Man and the Polar Regions both used complex multi-projector, multi-screen systems.

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While impressive, Cinerama was difficult to install and maintain, requiring careful alignment and synchronization of the multiple projectors. In the 1950s, the potential of 35 mm film to provide wider projected images was explored in the processes of CinemaScope (1953) and VistaVision (1954), following multi- projector systems such as Cinerama (1952). In 1929, Fox introduced Fox Grandeur, the first 70 mm film format, but it quickly fell from use. The desire to increase the visual impact of film has a long history. This technique produces an area that is about 8.3 times as large as the 35 mm format, and about 3.4 times as large as 70 mm film run through the projector vertically. The IMAX film standard uses 70 mm film run through the projector horizontally.

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Since 2018, the Laser system has been employed to retrofit full dome installations, with limited results due to the large area of a dome screen.Ī comparison between 35 mm and 15/70 mm negative areas. Both technologies are purely digital and suitable to retrofit existing theaters. Later came the introduction of the IMAX Digital 2K and IMAX with Laser 4K in 20 respectively, still limited in respect to the 70 megapixels of equivalent resolution of the original 15/70 film. The smaller projectors were used to retrofit existing theaters, so as to make IMAX available to multiplex and existing theaters, though losing much of the quality of the GT experience. To reduce costs, the IMAX SR and MPX systems were introduced in 19, respectively. The high costs involved in the construction and maintenance of the dedicated buildings and projectors suggested the introduction of several compromises in the following years. It is used exclusively in purpose-built theaters and dome theaters, and many installations limit themselves to a projection of high quality, short documentaries. It uses very large screens of 18 by 24 metres (59 by 79 feet) and, unlike most conventional film projectors, the film runs horizontally so that the image width can be greater than the width of the film stock. IMAX GT is the large format as originally conceived. Shaw were the co-founders of what would be named the IMAX Corporation (founded in September 1967 as Multiscreen Corporation, Limited), and they developed the first IMAX cinema projection standards in the late 1960s and early 1970s in Canada. Graeme Ferguson, Roman Kroitor, Robert Kerr, and William C. IMAX is a proprietary system of high-resolution cameras, film formats, film projectors, and theaters known for having very large screens with a tall aspect ratio (approximately either 1.43:1 or 1.90:1) and steep stadium seating. For the car known as the Hyundai iMax in some markets, see Hyundai Starex.

For the company responsible for this format, see IMAX Corporation. This article is about the IMAX motion picture film format.