A NolanFans user found a list of US and Canada 70mm theatre Dunkirk locations hidden in the source code on the Official Website for Dunkirk. Yesterday we tweeted that the ticket sales for 70mm showings of Dunkirk have been pushed back to July 5, but until now nobody knew which locations would actually have 70mm.

The list includes Standard 70mm (5-perf/70mm) theaters as well as IMAX 70mm (15-perf/70mm) theaters. Many of you know the difference between the two formats, but for those of you that do not, we’ll give you a brief overview.

Standard 65/70mm film has been around for well over a century. However, it wasn’t more widely or popularly used until the 1950s. Many classic films, like Lawrence of Arabia and 2001: A Space Odyssey, were filmed and presented on 70mm, but the format stopped being used by the 70s. Sometimes the format is abbreviated as 5/70 as each frame of film is 5 perforations tall and 70mm wide. That translates to 0.9 inches by 2 inches. You’ll commonly see 65mm used interchangeably with 70mm, and that’s because 65mm is the shooting format, and 70mm is the projecting format. When projected, 5/70 typically has an aspect ratio of 2.20:1.

IMAX 65/70mm film was developed by the IMAX Corporation in the late 60s. Unlike Standard 70mm, which runs vertically through a camera or projector, IMAX 70mm runs horizontally. It also uses 15 perforations per frame, as opposed to 5, thus giving it a larger picture area. Sometimes the format is abbreviated as 15/70. Its overall size is 2 inches by 2.75 inches. The format was commonly only used for IMAX nature and science documentary films, but in 2008 Christopher Nolan pioneered its use for Hollywood blockbusters on The Dark Knight. When projected, 15/70 typically has an aspect ratio of 1.44:1.

Dunkirk was shot using both formats. Though there has been no official confirmation, it is believed approximately 75% of the movie was shot on IMAX 65mm film with the remainder being filmed on Standard 65mm film. This ratio is larger than any of Nolan’s other uses of IMAX, and Nolan’s first film shot entirely on 65mm.

So enough with the history lesson, here’s the list of theaters showing Dunkirk on 70mm:

ALBERTA

Scotiabank Chinook 16 IMAX (Calgary)

Scotiabank IMAX (Edmonton)

ALABAMA

IMAX Dome Theater (Birmingham)

US Space Center IMAX (Huntsville)

ARIZONA

AMC Westgate (Glendale)

Grand Canyon IMAX (Grand Canyon Village)

Harkins Tempe Marketplace (Tempe)

Loft (Tuscon)

BRITISH COLUMBIA

Cineplex Colossus IMAX (Langley)

Cineplex Park (Vancouver)

CALIFORNIA

AMC Burbank 16 (Burbank)

Century Daly City (Daly City)

Regal Hacienda 20 IMAX (Dublin)

ArcLight Hollywood (Hollywood)

Regal Irvine Spectrum IMAX (Irvine)

ArcLight 14 (La Jolla)

Grossmont Center 10 (La Messa)

Regal Long Beach Stadium (Long Beach)

Cinemark 18 (Los Angeles)

Landmark 12 (Los Angeles)

Regal Ontario Palace 22 IMAX (Ontario)

Sagewood Camelot (Palm Springs)

Esquire IMAX (Sacramento)

Tower Theatre (Sacramento)

AMC Mission Valley (San Diego)

AMC Metreon IMAX (San Francisco)

Cinemark San Francisco Center (San Francisco)

Century Oakridge (San Jose)

Hackworth IMAX (San Jose)

AMC Mercado (Santa Clara)

ArcLight Sherman Oaks (Sherman Oaks)

AMC Del Amo 18 (Torrance)

Cinemark Union City 25 (Union City)

AMC Citywalk IMAX (Universal City)

COLORADO

Regal Contiental (Westminster)

AMC Westminster 24 (Vancouver)

WASHINGTON D.C.

Regal Gallery Palace Stadium 24 (D.C.)

FLORIDA

Cinemark Palace (Boca Raton)

Coral Gables Art Cinema 1 (Coral Gables)

AMC Disney Springs 24 (Lake Buena Vista)

AMC Aventura (Miami)

Regal Waterford Lakes (Orlando)

AMC Veterans (Tampa)

AMC Parisian (West Palm Beach)

GEORGIA

Regal Atlantic Station (Atlanta)

Regal Mall of Georgia 20 (Buford)

IOWA

Sci Dome IMAX (Des Moines)

ILLINOIS

River East 21 (Chicago)

Keresotes Showplace Icon (Chicago)

Music Box (Chicago)

Cinemark Evanston (Evanston)

INDIANA

White River IMAX (Indianapolis)

KANSAS

AMC Town Center (Leawood)

LOUISIANA

AMC Elmwood Palace (New Orleans)

MASSACHUSETTS

AMC Boston Common (Boston)

Coolidge Corner 2 (Brookline)

Somerville 5 (Somerville)

MARYLAND

AFI Silver 3 Theatre (Silver Springs)

AMC White Marsh (Baltimore)

Cinemark Egyptian (Baltimore)

Maryland Science Center IMAX (Baltimore)

MICHIGAN

AMC Livonia (Livonia)

AMC Forum 30 (Sterling Heights)

MISSOURI

OMNIMAX (St. Louis)

Marcus Ronnies (St. Louis)

NORTH CAROLINA

Discovery Place IMAX (Charlotte)

Regal Stonecrest (Charlotte)

AMC Southpoint (Durham)

NEW JERSEY

AMC Cherry Hill (Cherry Hill)

AMC Hamilton 24 (Hamilton)

AMC Garden State (Peramus)

NEW MEXICO

Cinemark Rio 24 (Albuquerque)

NEVADA

AMC Town Sqaure (Las Vegas)

NEW YORK

Alamo Drafthouse Downtown Brooklyn (Brooklyn)

Farmingdale 14 (Farmingdale)

Regal New Roc City (New Rochelle)

AMC Lincoln Square IMAX (New York)

City Cinemas East 86th St. (New York)

Cinema 1,2,3 (New York)

Village East 7 (New York)

Regal E-Walk Stadim (New York)

OHIO

Gateway Film Center 7 (Columbus)

Cinemark Valley View (Valley View)

ONTARIO

Cineplex Coliseum IMAX (Mississauga)

Cineplex Varsity 12 (Toronto)

Cineplex Colossus IMAX (Woodbridge)

OREGON

Hollywood 3 (Portland)

Regal Bridgeport (Tigard)

PENNSYLVANIA

AMC Neshaminy 24 (Bensalem)

Regal King of Prussia 15 IMAX (King of Prussia)

Tuttleman IMAX (Philadelphia)

AMC Waterfront (West Homestead)

NEWFOUNDLAND

Cineplex Banque Scotia 12 (Montreal)

RHODE ISLAND

Providence Place IMAX (Providence)

SASKATCHEWAN

Regina IMAX (Las Vegas)

TENNESSEE

AMC Thoroughbred (Franklin)

Regal Pinnacle Stadium (Knoxville)

Regal Opry Mills 20 IMAX (Nashville)

TEXAS

Studio Movie Grill 9 (Arlington)

Alamo Drafthouse Ritz (Austin)

AMC Northpark 15 (Dallas)

Look 11 (Dallas)

Studio Movie Grill Royal Lane 9

Cinemark 17 IMAX (Dallas)

OmniaMAX Fort Worth (Fort Worth)

AMC Gulf Pointe (Houston)

Regal Edwards Freenway Grand Palace (Houston)

Cinemark Tinseltown (Pflugerville)

Cinemark West Plano (Plano)

Santikos Palladium 19 (San Antonio)

VIRGINA

AMC Hoffman Center (Alexandria)

AMC Tyson’s Corner (McLean)

WASHINTON

AMC Pacific Place 11 (Seattle)

Cinerama (Seattle)

WISCONSIN

Marcus Majestic Cinema of Brookfield (Waukesha)