What Is IMAX? Formats, Aspect Ratios and Whether It’s Worth It

Walk past almost any modern multiplex and you will see the three letters plastered above one particular auditorium door, usually next to a higher ticket price. IMAX has become shorthand for “the big, serious way to watch a movie.” But the brand now covers several genuinely different technologies, and the gap between the best IMAX screen in the world and the smallest one branded IMAX is enormous. If you have ever paid extra and walked out wondering whether the upgrade was real, this guide is for you.

Below we break down what IMAX actually is, how it differs from a standard cinema screen, the three main formats you are likely to encounter (70mm film, IMAX with Laser and digital IMAX), the much-discussed idea of an “expanded aspect ratio,” the internet’s favourite insult, “LieMAX,” and finally whether the premium is worth paying.

What is IMAX, exactly?

IMAX, short for “Image Maximum,” is a large-format cinema system built around one core idea: put more image in front of your eyes than a conventional screen can. It began in the late 1960s and early 1970s as a specialty format for museums, science centres and planetariums, using enormous frames of film to fill towering screens. For decades an IMAX trip meant a nature documentary about coral reefs or space, projected onto a screen several storeys tall.

What sets IMAX apart is not a single trick but a package. The company designs the projector, the screen geometry, the sound system and the auditorium layout together, and it calibrates and certifies each location rather than simply selling equipment. Traditional IMAX screens are not only wider than standard ones, they are dramatically taller, and the seating is arranged so the picture fills much more of your field of view. Combined with a powerful, bass-heavy sound system, the goal is immersion: the sense that the image surrounds you instead of sitting politely in a rectangle across the room.

Over the 2000s IMAX moved out of the museum and into the mainstream multiplex, partnering with commercial chains to show Hollywood blockbusters. That expansion is exactly what made the brand famous, and also what made it complicated, because “IMAX” at your local cinema is not always the same thing as the giant film screens the format was built on.

How is IMAX different from a standard screen?

On a purely technical level, a standard cinema auditorium and an IMAX auditorium can look similar from the lobby. The differences show up on the wall and in your seat.

• Screen size and shape. A standard screen is a wide rectangle. A purpose-built IMAX screen is far larger and proportionally taller, sometimes stretching close to the full height of the room and gently curved to wrap into your peripheral vision.
• Aspect ratio. Most films are shown at a wide 2.39:1 or 1.85:1 shape. IMAX can present a much taller frame, which means for films that support it you literally see more picture from top to bottom, not just a wider strip.
• Projection. IMAX auditoriums typically use dual-projector systems for extra brightness and resolution, whether that is film or laser, rather than the single projector common in a regular screen.
• Sound. IMAX uses its own multi-channel sound design, historically a 12-channel layout with powerful floor-mounted subwoofers tuned for high-impact, physical bass you feel as much as hear.
• Room design. Steeper stadium seating and a screen that starts close to the floor push the picture into more of your vision, so fewer rows feel like “bad seats.”

The takeaway is that IMAX is a whole-room experience. When every element is present and correct, the difference from a standard screen is obvious. The catch is that not every IMAX-branded room delivers every element, which is where the format names start to matter.

What are the types of IMAX (70mm, Laser, Digital)?

There are three formats worth knowing, and they vary enormously in quality and in how many of them exist.

IMAX 70mm film (15/70)

This is the original, the format purists mean when they say “true IMAX.” It runs 70mm film horizontally through the projector using 15 perforations per frame, giving a negative many times larger than standard 35mm and even larger than conventional 70mm. It presents a tall, nearly square 1.43:1 image on the biggest screens in the network. The resolution and sheer image area are staggering, which is why directors such as Christopher Nolan shoot key sequences on IMAX film cameras. The downside is scarcity and cost: only around 45 venues worldwide can still project 15/70 film, so most audiences will never see it.

IMAX with Laser

Introduced to modernise the network, IMAX with Laser uses laser projection instead of film or older lamp-based digital projectors. The premium version, sometimes called the GT laser system, uses dual laser projectors and can fill the tall 1.43:1 screens, delivering brightness and contrast that can actually exceed film thanks to the laser’s power and its ability to switch individual pixels fully off for deep blacks. These flagship 1.43:1 laser houses are rare, numbering only around a dozen in North America. A more widespread version, often marketed as IMAX with Laser at the wider 1.90:1 shape, brings much of the clarity, brightness and colour to a larger number of screens. If you cannot get to a 70mm film house, a good laser auditorium is the next best thing.

IMAX Digital

Launched in 2008, IMAX Digital was the lower-cost system that let the brand expand rapidly into existing multiplexes. The earliest version used two 2K digital projectors and a 1.90:1 screen. Crucially, many of these rooms were retrofitted into existing auditoriums, so the screens were considerably smaller than purpose-built IMAX halls, and the older 2K resolution was well short of what film could resolve. Digital IMAX is why the format is now everywhere, with the large majority of roughly 1,800 IMAX screens worldwide using some form of digital projection. It is also the version that generated the most criticism, and the nickname we will get to shortly.

What is expanded aspect ratio?

This is the single most misunderstood part of the IMAX conversation, and it explains why the same film can feel very different from one IMAX screen to another.

Most movies are framed for a wide rectangle. But when a filmmaker shoots with IMAX cameras, or prepares a special IMAX release, certain scenes are formatted to a taller frame that reveals more image at the top and bottom. IMAX markets this as an “expanded aspect ratio.” On a screen capable of the tall 1.43:1 shape, those sequences balloon upward and downward to fill the wall, and you genuinely see more of the scene than a standard-cinema audience does. This is why fans travel long distances to specific venues for films by directors who shoot on IMAX cameras.

Here is the crucial part. That extra vertical image only appears if the screen and projector can actually show the taller frame. In a 1.90:1 house you get a taller picture than a normal cinema but not the full 1.43:1, and in a standard 2.39:1 presentation the top and bottom of the IMAX-framed shots are cropped away entirely. So a movie advertised as “filmed for IMAX” can range from a jaw-dropping floor-to-ceiling image on a film or GT laser screen, to a modestly taller frame on a digital screen, to a plain widescreen version at a regular multiplex. Same movie, very different amount of picture.

Why do people call some screens “LieMAX”?

“LieMAX” is a derogatory nickname coined by movie enthusiasts for IMAX-branded auditoriums that, in their view, do not live up to the name. The complaint dates from the digital expansion. When IMAX rolled out its cheaper 2K digital system into existing buildings, some of the new screens were far smaller than the towering halls the brand was built on, and the early 2K projectors resolved far less detail than IMAX film. Critics argued that paying an IMAX premium to sit in front of a screen only modestly bigger than the multiplex next door, showing a wider but shorter image, was not the experience the logo promised.

It is worth being fair here. The term is a fan-community insult, not an official category, and IMAX’s newer laser systems have closed much of the quality gap even in smaller rooms. Modern laser projection is bright, sharp and high-contrast, and a well-run 1.90:1 laser house can be genuinely excellent. But the underlying point still holds: not all IMAX screens are the same size or resolution, and the branding alone does not tell you which one you are walking into. That is why seasoned moviegoers check the specific auditorium, not just the logo, before buying.

How does IMAX compare to Dolby Cinema?

IMAX’s main premium-format rival is Dolby Cinema, and the two chase immersion in different ways. IMAX leads on scale: the biggest, tallest screens and the expanded aspect ratio for films that use it, plus a physical, bass-forward sound signature. Dolby Cinema leads on picture finesse and audio precision. It pairs Dolby Vision projection, a high-dynamic-range system using dual laser projectors for very deep blacks, bright highlights and rich colour, with Dolby Atmos object-based sound spread across a large number of speakers placed around and above the audience.

The practical differences: Dolby Cinema screens are wide but generally not as tall or as large as flagship IMAX, and they present films in their standard widescreen shape rather than an expanded vertical frame. Dolby’s picture tends to win on contrast and colour depth, while IMAX wins on raw size and the extra image you see with IMAX-shot movies. Neither is simply “better.” It depends on the film and on which specific auditoriums your city actually has.

Is IMAX worth the extra cost?

The honest answer is that it depends entirely on which IMAX screen you are buying, and which film you are seeing. The premium is easiest to justify in three situations.

• The film was shot for IMAX. If a movie was photographed with IMAX cameras and gets an expanded-aspect-ratio release, a true 1.43:1 film or laser screen shows you meaningfully more image. This is the strongest case for paying up, and worth travelling for.
• The venue is a real large-format house. A genuine giant screen with laser or film projection delivers scale you cannot get at home or in a standard auditorium. Big spectacle films, space, action and animation benefit most.
• The sound matters to you. IMAX’s bass-forward mix adds real physical impact to blockbusters, concerts and effects-driven films.

The premium is harder to justify when the auditorium is a small retrofitted digital screen, when the film was not framed for IMAX at all, or when a nearby standard screen is already large and well-run. In those cases the upgrade may be marginal. The smart move is simple: before you book, find out which IMAX format the auditorium uses and whether the film has an expanded IMAX version. A little research turns “is IMAX worth it?” from a gamble into a confident yes or no. When the format, the film and the venue line up, IMAX remains one of the most impressive ways to watch a movie. When they do not, you are mostly paying for the logo.

Frequently Asked Questions

Is IMAX always better than a normal screen?

Not automatically. A flagship IMAX screen with film or laser projection is clearly superior for the right film, but a small retrofitted digital IMAX room may only be a modest step up from a good standard auditorium. The specific venue and format matter more than the logo.

How can I tell if my local IMAX is “real” IMAX?

Check the format the cinema lists. IMAX 70mm film and the tall 1.43:1 laser houses are the top tier, wider 1.90:1 laser is very good, and older 2K digital screens are the ones critics call “LieMAX.” Screen height and the aspect ratio quoted are good clues, so look those up before booking.

What does expanded aspect ratio actually change?

For films shot with IMAX cameras, an expanded aspect ratio means certain scenes fill more of the screen vertically, so you see extra image at the top and bottom. You only get the full effect on a screen that can display the taller 1.43:1 frame; on wider or standard screens that extra image is reduced or cropped.

Is IMAX or Dolby Cinema the better choice?

IMAX generally wins on sheer screen size and on the expanded image for IMAX-shot movies, while Dolby Cinema tends to win on contrast, colour depth and finely placed Atmos sound. The best pick depends on the specific film and on which premium auditoriums your city actually offers.

Is it worth paying extra for IMAX?

It is well worth it when a film was made for IMAX and you can see it on a large film or laser screen. It is less compelling for a movie that was not framed for IMAX or when the only nearby option is a small digital screen. Checking the format and the film’s IMAX version beforehand is the surest way to decide.