IMAX and Large Format

For many moviegoers, the choice of where to see a film is almost as important as the film itself. In an era of endless streaming options, cinemas have had to reinvent themselves, and premium large format screens have become a major draw. Among these, IMAX stands as the most recognizable and influential name, synonymous with giant screens and immersive sound. But what exactly makes IMAX different from a standard theater, and why do audiences and filmmakers alike continue to champion it? This article explores the history, technology, and experience of IMAX and large format cinema.

The Origins of Large Format Cinema

The quest for a bigger, more immersive movie image is as old as cinema itself. In the 1950s, Hollywood, threatened by the advent of television, introduced a variety of widescreen processes to lure audiences back into theaters. Cinerama, which used three synchronized projectors on a deeply curved screen, was a sensation but proved too cumbersome for widespread adoption. CinemaScope, using anamorphic lenses, offered a widescreen image on standard 35mm film and became the industry standard. Yet these formats were still constrained by the limitations of 35mm film grain and projection brightness. The idea of a truly large format—using a much larger film frame—remained elusive until a group of Canadian filmmakers and engineers set out to solve the problem.

IMAX was born at Expo 67 in Montreal, where the company's first film, 'Tiger Child,' was shown on a multi-screen setup. The founders—Graeme Ferguson, Roman Kroitor, Robert Kerr, and William Shaw—wanted to create a system that would make viewers feel as though they were part of the action. Their breakthrough was the development of a 70mm film format that ran horizontally through the projector, producing an image area ten times larger than standard 35mm. This allowed for unprecedented sharpness and brightness on a screen that could be over 100 feet wide. Initially, IMAX theaters were found mainly in museums and science centers, showing nature documentaries and space films. But the format's potential for narrative cinema was soon recognized.

The transition to Hollywood blockbusters came in the late 1990s and early 2000s. In 2002, IMAX introduced its DMR (Digital Re-Mastering) process, which converted conventional 35mm films to the IMAX format with enhanced image quality. The release of 'Apollo 13' in IMAX DMR was a turning point, proving that audiences would pay a premium to see popular films on the giant screen. This led to a rapid expansion of IMAX theaters in multiplexes, and eventually to filmmakers shooting with IMAX cameras for selected sequences. Christopher Nolan's 'The Dark Knight' (2008) featured severm film, and its success cemented IMAX as a mainstream format for blockbuster cinema.

The Science of the Giant Screen

The core of IMAX's appeal lies in its ability to fill the viewer's field of vision. A typic to 40 degrees of the viewer's horizontal field of view. IMAX screens are designed to extend beyond 70 degrees, approaching the limits of peripheral vision. This, combined with the screen's curvature and the steeply raked seating, creates a sense of immersion that smaller screens cannot match. The image seems to surround you, pulling you into the film world. But achieving this effect requires more than just a big screen; it demands precise control of geometry, projection, and sound.

IMAX theaters are constructed to exacting specifications. The screen is often floor-to-ceiling and wall-to-wall, and the seating is arranged so that every seat has an unobstructed view. The projection booth is positioned to minimize keystone distortion, and the screen is perforated to allow sound from speakers placed behind it to pass through clearly. IMAX also employs a custom sound system that, in its current iteration, uses 12 channels (or more) of audio, including overhead speakers, to create a three-dimensional soundscape. The combination of visual and auditory immersion is what sets IMAX apart from a standard 'big screen' experience.

Underlying the experience is the film or digital capture. Traditionm stock running horizontally, with a frame size of 70mm x 48.5mm—roughly 8 times the area of 35mm film. This massive negative captures extraordinary detail and dynamic range. In the digital era, IMAX has adopted laser projection systems that deliver high brightness, deep blacks, and wide color gamut. The current flagship is the IMAX with Laser system, which uses dual 4K laser projectors to achieve a brightness of up to 22 foot-lamberts in 2D, significantly brighter than standard digital cinema. The result is a picture that is sharp, vivid, and lifelike.

Film vs. Digital: The Ongoing Debate

Despite the advances in digital, many filmmakers and cinephiles still consider IMAX 70mm film to be the gold standard. A 70mm IMAX frame has an effective resolution estimated at 18K, far beyond any current digital projection. However, film prints are expensive to produce and ship, and only a handful of theaters (around 30 worldwide) are equipped to project them. Digital IMAX, particularly the newer laser systems, offers a practical alternative with excellent quality, but some argue it lacks the organic texture of film. IMAX has responded by maintaining a select number of 70mm venues and supporting filmmakers who choose to shoot on film, such as Nolan with 'Oppenheimer.'

IMAX vs. the Competition

IMAX is far from the only premium large format option. Dolby Cinema, launched in 2015, is perhaps its closest competitor. Dolby Cinema combines Dolby Vision high dynamic range projection with Dolby Atmos object-based audio (see our article on Dolby Atmos Sound for more on that technology). While IMAX emphasizes screen size and immersion through scale, Dolby Cinema focuses on image quality and contrast, boasting deep blacks and vibrant colors. Dolby screens are typically smaller than IMAX screens but are often considered to have superior picture quality. Other formats, like Regal's RPX, Cinemark's XD, and AMC's Prime, offer larger screens and enhanced sound but do not have proprietary capture or projection technologies; they are essentially premium auditoriums with standard projection.

A key differentiator is aspect ratio. IMAX can present films in an expanded aspect ratio, up to 1.43:1 in true IMAX theaters, which is much taller than the standard 2.39:1 widescreen or 1.85:1 flat. This means that during scenes shot with IMAX cameras, the audience sees more of the image—often a dramatic expansion of the frame. Other large formats typically do not change the aspect ratio; they show the same image on a bigger screen. For filmmakers, the ability to change aspect ratio within a film is a creative tool that can heighten impact, but it requires careful planning. For audiences, it can be a thrilling moment when the image suddenly fills the entire screen.

• Screen size: IMAX screens are generally larger, often curved, and extend into peripheral vision.
• Aspect ratio: IMAX can show expanded ratio content up to 1.43:1; others usually fixed at 2.39:1 or 1.85:1.
• Projection: IMAX uses dum film; Dolby Cinema uses Dolby Vision laser; RPX/XD use standard digital projection.
• Sound: IMAX uses proprietary 12-channel system; Dolby uses Atmos; others use standard 7.1 or similar.
• Content: IMAX often has exclusive expanded ratio versions; others show the same version as standard theaters.

Filmmaking in IMAX

A growing number of directors are embracing IMAX as a filmmaking tool, not just an exhibition format. Christopher Nolan is the most vocal advocate, having used IMAX cameras on 'The Dark Knight,' 'The Dark Knight Rises,' 'Interstellar,' 'Dunkirk,' 'Tenet,' and 'Oppenheimer.' Nolan values the format's ability to capture immense detail and its impact on the cinematic experience. Other filmmakers, such as James Cameron with the 'Avatar' sequels, the Russo brothers on 'Avengers: Infinity War' and 'Endgame,' and Denis Villeneuve on 'Dune' and 'Dune: Part Two,' have also employed IMAX-certified cameras or shot in large formats. The appeal is simple: the larger the image area, the more information and emotion can be conveyed.

Shooting with IMAX cameras presents significant challenges. The original IMAX film cameras are large, heavy, and loud, making them unsuitable for dialogue-heavy scenes. Digital IMAX-certified cameras, such as the ARRI Alexa IMAX, are smaller and quieter but still require extensive post-production to maintain the IMAX quality. Typically, only select sequences are shot in IMAX, while the majority of the film uses conventional cameras. This results in a mixed aspect ratio presentation: the IMAX scenes expand to fill the taller screen, creating a noticeable transition. Some viewers find this jarring, but many appreciate the visual shift as a signal of important moments.

"The sharpness and clarity of the image is unparalleled." — Christopher Nolan

The Audience Experience

For the moviegoer, stepping into an IMAX theater is an event. The sheer scale of the screen, combined with the powerful sound, creates a sensory experience that is hard to replicate at home. Blockbusters, nature documentaries, and epic dramas all take on new life in IMAX. The format is particularly suited to films with grand vistas, intricate production design, and complex action sequences. Watching a film like 'Dune' or 'Interstellar' in IMAX can feel like a different movie compared to a standard screening; the details are sharper, the colors richer, and the sound envelops you from all directions.

However, not every IMAX venue delivers the same experience. The term 'IMAX' has been applied to many theaters with varying screen sizes and projection systems. Some are true giant screens (over 80 feet wide) with 70mm film or laser projection, while others are retrofitted multiplex auditoriums with screens barely larger than standard and older xenon digital projectors. These smaller digital IMAX screens, sometimes derisively called 'LieMAX,' have drawn criticism from purists who feel the brand has been diluted. To get the full IMAX experience, consumers are advised to seek out theaters with laser projection or 70mm capability, and to check screen dimensions—the larger the better.

The Future of Large Format

As home entertainment systems improve, cinemas must offer experiences that cannot be matched in a living room. Large format is a key differentiator. IMAX continues to innovate, with new laser projection systems that offer even higher brightness and contrast, and plans to expand its footprint in emerging markets. The success of films like 'Oppenheimer' and 'Dune: Part Two,' which were heavily marketed as must-see-in-IMAX events, has demonstrated the format's box office power. In 2023, IMAX reported record revenue, driven by the popularity of films shot with IMAX cameras.

Looking ahead, large format may evolve to include higher frame rates, virtual production, and even more immersive audio technologies. IMAX has also ventured into home entertainment with IMAX Enhanced, a certification program for TVs and sound systems. While the core experience remains the giant screen, the brand is adapting to changing viewing habits. One thing is certain: as long as audiences crave spectacle and filmmakers seek to push the boundaries of storytelling, there will be a place for the biggest screens. And among them, IMAX remains the gold standard.