Posted 4/22/10. Originally published in LF
Examiner, April 2010.
The Shrinking IMAX Screen
In September 2008, Imax Corporation CEO Richard Gelfond told the
Giant Screen Cinema Association, “We don’t think of [IMAX] as the giant screen,” and the company has been working to reinforce that position ever since. A few months earlier, the company had launched its first digital IMAX theaters in retrofitted 35mm multiplex
Today there are 162 IMAX digital theaters, with more opening every month. Since most digital projection systems are installed in existing auditoriums, their screens are much smaller than those of purpose-built IMAX theaters with 15/70 film projectors.
Over its forty years in business, Imax has developed four basic projector models:
|GT: Introduced in 1970. The original, large
rolling-loop projector, about the size of a compact car. The
largest systems use a 15,000-watt, water-cooled lamp. The only
system used in IMAX Dome theaters. It is also available in a
dual-rotor 3D version. Installed base: 191.
SR: Introduced in January 1998. The first compact system
intended to lower hardware and construction costs for multiplex
customers, relative to the GT. Consists of two small-rotor projectors
that can project 3D or be used in changeover mode to run longer films.
Installed in slightly smaller, but still custom-built, auditoriums with
screens up to 55x75 feet (17x23 meters). Installed base: 54.
MPX: Introduced in June 2004. Designed specifically to be
retrofitted into multiplex theaters, and as a placeholder for the
digital system then in development, it has two small rotors and fits in
the footprint of a standard 35mm projector. Many MPXes have been
converted to digital, and most of the remaining ones will probably be
converted in the next year or two. It is intended for screens up to 70
feet wide and has a 1.8 aspect ratio. Installed base: 31.
|Digital: Introduced in July 2008. Two
Christie CP2000SB projectors, with an IMAX-designed operator
interface and a proprietary “image enhancement engine.”
Usually installed in existing 35mm auditoriums. It is intended for
screens up to 70 feet wide and has a 1.9 aspect ratio. Installed
The largest GT theater has a screen 96 feet wide and 117 feet tall (29x36 meters). On average, GT screens are 60x80 feet (18x24 meters), but with the introduction of the subsequent models, the average screen size began to shrink.
This chart illustrates that process.
The outline of the chart itself represents the size and aspect ratio of the average GT screen, with an area of nearly 5,000 square feet (465 square meters). The smaller rectangles inside represent the average size of the other projectors, and show the average area and percentage of the average GT screen area.
The red curve at the top of the chart represents the running average screen size of all IMAX theaters over the years, excluding dome screens. The
blue curve at the bottom shows the number of theaters open over time. (Its scale is on the right, and is one tenth of the value of the area scale on the left.)
Through the late 1980s and 1990s, average screen sizes grew steadily. The SR systems, with screens around 75% the size of GT screens, lowered the average only slightly in the first decade of the 21st century. But the introduction of the MPX in 2004 began a more rapid expansion of IMAX theaters into multiplexes and a concomitant decrease in the average area. That drop accelerated significantly with the launch of the IMAX digital system in the summer of 2008.
The average IMAX digital screen has an area of 1,884 feet, less than 40% that of the average GT screen.
The largest digital IMAX screens are in two purpose-built theaters originally equipped with MPX systems, the RC Reading Movies 11 & IMAX in Reading, PA, and the Kerasotes ShowPlace 16 in Indianapolis, IN. Both have screens 42x70 feet (13x21 meters), the nominal maximum for MPX and digital IMAX projectors.
However, the largest retrofitted (as opposed to purpose-built) auditoriums we visited had screens that were 37.5x63.5 feet (11.5x19.5 meters), nearly 20% smaller than those two, and the smallest was 23x48 feet (7x14 meters) or 1,104 square feet (103 square meters), 38% the size of the largest digital screens, and 22% the area of the average GT screen. This screen, in Hartford, CT, and a handful of others, are less than one-tenth the size of the world’s largest IMAX screen, in Sydney, Australia, which has an area of 11,310 square feet (1,050 square meters).
The outer border of the full-size chart (click
here) represents the area of the Sydney screen, and the smallest rectangle represents the smallest IMAX screen in the world.
About our data
During Imax Corporation’s first three decades, it regularly published lists of all its theaters with details such as
projector type, screen size, and number of seats. The data for most of the GT, SR, and MPX theater represented on this chart are taken from those official lists.
However, since 2007, no such lists have been available, and Imax and its two largest joint-venture partners,
Regal Entertainment Group and AMC Entertainment, have declined repeated requests from LF Examiner and the Giant Screen Cinema Association to provide screen sizes for their IMAX digital theaters. Therefore, our figures for the
average size of a digital screen are based on press reports in a few cases, as well as measurements we have personally made with an accurate laser rangefinder in 39 digital theaters in ten states. We believe that averaging nearly one quarter of the extant digital IMAX screens provides an accurate representation of all of them.