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 nine times larger than the 35 mm format, and three times larger than 70 mm film which was run conventionally through the projector in a vertical orientation.

The IMAX film standard uses 70 mm film run through the projector horizontally. The Laser system present was used since 2018 to retrofit also fulldome installation, 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 theater. On the same line came the introduction of the IMAX Digital 2K and IMAX with Laser 4K in 20, extremely limited in respect to the 70 Mpixels of equivalent resolution of a 70/15 film. The smaller projectors were used to retrofit existing theater, so as to spread IMAX also to multiplex and existing theater, losing much of the quality of the GT experience. To reduce costs the IMAX SR and MPX system was introduced in 19. The large costs involved in the construction and maintenance of the dedicated building 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 × 24 m 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 1.89:1) and steep stadium seating.

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