IMAX and IMAX 70mm are fundamentally different cinematic display formats. While digital IMAX relies on high-resolution digital projection systems and a 1.90:1 aspect ratio, IMAX 70mm utilizes physical 15-perforation film running horizontally through legacy analog projectors to deliver an expansive 1.43:1 aspect ratio with significantly higher native resolution.
As cinephiles flood box offices for major releases like Christopher Nolan’s “The Odyssey”—which hit theaters on July 17, and became the first feature film shot entirely on 70mm IMAX cameras—securing tickets has turned into an endurance test. According to IMAX CEO Richard Gelfond in an interview with Variety, 70mm IMAX screenings have sold out deep into the movie’s fifth week, drawing even 2 a.m. and 7 a.m. time slots. This demand has casual moviegoers asking a fundamental engineering and presentation question: What actually separates standard IMAX from its analog celluloid counterpart?
Physical Celluloid Versus Digital Rendering Architecture
The core divergence between the two formats lies in the physics of light capture and projection. Traditional 70mm IMAX is an analog format where each individual film frame features 15 perforations and runs horizontally through the projector gate. This yields the largest and highest-resolution physical frame available, giving audiences a massive vertical field of view that fills floor-to-ceiling screens.
Film marketing professional Lia Baek notes that 70mm IMAX film “can deliver exceptionally high image detail and show more image vertically than most digital IMAX or standard screenings.” By projecting light through physical celluloid, the format produces rich analog color depth and visual clarity reaching up to three times the resolution of standard digital projection formats. In contrast, standard digital IMAX and IMAX with Laser systems bypass physical film entirely, rendering pixels via digital arrays that typically present films in a 1.90:1 expanded aspect ratio, though select laser locations can also achieve the 1.43:1 ratio.
The Hardware Bottleneck and Infrastructure Challenges
Deploying 70mm IMAX is an engineering challenge for modern theater chains. The machinery required to run these giant film prints is limited. IMAX CEO Walter Gelfond explained to Variety that the core issue is simple: manufacturers stopped building new IMAX film projectors roughly 50 years ago. Exhibitors must rely on retrofitting and rebuilding vintage hardware to keep the format alive.
Walter Nicoletti, founder of Voce Spettacolo, highlights the maintenance overhead and operational costs as barriers to widespread adoption. Exhibiting a single feature-length 70mm film strip requires massive reels, with a single reel weighing over 500 pounds. This hardware scarcity explains why 70mm IMAX screenings remain limited, operating in only 25 movie theaters across the United States.
Aspect Ratios and Perceived Immersion
The geometric footprint on screen dictates how the audience experiences the narrative. Regular IMAX presents content with a 1.90:1 aspect ratio. IMAX 70mm expands that canvas further, utilizing a 1.43:1 aspect ratio that dominates both the horizontal and vertical peripheries.
Cast members involved in large-format productions frequently emphasize this spatial shift. As Matt Damon explained on the film’s official promotional channels, viewing the work in its native format allows audiences to feel the “full impact of how it was shot.” Fellow cast member Anne Hathaway added that the presentation “fills your entire field of vision, immersing you fully for the best cinematic experience.” Lupita Nyong’o underscored the tactile nature of the medium, stating that “there’s nothing like seeing a movie shot on film presented on film.”
The 30-Second Verdict for Moviegoers
If you managed to secure a ticket at one of the 25 domestic locations supporting the format, IMAX 70mm delivers high physical resolution, authentic celluloid warmth, and a towering 1.43:1 aspect ratio. For everyone else, digital IMAX and IMAX with Laser provide a highly immersive alternative that scales the image across modern digital pipelines without the 500-pound reel logistics.
