Aspect Ratio

Image Aspect Ratios
PercentageRatioRatioFactorNotes
1001:11:11×1Square, Instagram, 6×6 medium format (120 film)
1171.166:17:67×66×7cm medium format (120 film)
1201.2:16:56×520×24" large format
1221.222:111:911×9Video conferencing CIF (352×288), 4CIF (704×576), 16CIF (1408×1152)
1251.25:15:45×44×5" print, 8×10" print, 4×5" large format (Ansel Adams), 8×10" large format, press camera (typical U.S.), SXGA (1280×1024)
1271.27:114:1114×1111×14" print, 11×14" large format
1331.33:14:34×3Eyesight, QVGA (320×240), VGA (640×480), SVGA (800×600), ×GA and iPad (1024×768), PAL (576×520), NTSC (486×440), computer monitors, Four Thirds, medium format 645 (6×4.5cm) (120 film), 9×12cm medium format
1371.375:111:811×8Academy, Academy 4K (3656×2664), IMAX (5616×4096)
1401.4:17:55×75×7" print, 5×7" large format
1411.414:12:1Paper
1431.43:110:710×7IMAX
1501.5:13:23×235mm photos, APS-C, 4×6" print, 6×9cm medium format (120 film), DVGA and iPhone 4 (960×640)
1601.6:116:1016×105×8" large format, 1024×640 laptop (1280×800), (1680×105)
1621.618:1(1+√5)/2:1ΦGolden ratio (golden section, golden mean, divine proportion)
1671.666:15:35×312×20" view camera, W×GA (1280×768), Super 16mm (15:9)
1701.7066:1128:751024×600 (128:75)
1781.777:116:916×9HDTV, APS-H, iPhone 5 (1136×640), 720p (HD) (1280×720), 1080p and FullHD (FHD) (1920×1080), QHD (2560×144), 2160p (3840×2160), 4K (4096×2304), 4320p (7680×4320), 8K (8192×4608)
1851.85:137:20Cinema flat
1891.888:117:102K (2048×1080)
1901.9:1256:135Digital Cinema Initiatives 4k native (4096×2160)
1941.94:1768:3956K (6144×3160)
2002:12:12×140×80" large format, 6×12cm medium format
2202.2:111:5Todd-AO
2372.37:121:92560×1080
2392.39:1Cinema (also known as 240 — 2-4-0)
2402.4:112:55×125×12" view camera
2432.428:117:77×177×17" view camera
2502.5:15:22×54×10" view camera, 8×20" large format view camera
2672.67:18:33×8Cinemascope
2832.833:117:66×176×17cm panoramic medium format (120 film)
3003:13:13×1Panoramic, APS-P, Red Epic 617 (28000×9334)

From 35mm to 16:9 — a history of aspect ratio


By Andrew Hudson Published: July 28, 2013 Updated: July 17, 2014

Filmmaker IQ had an excellent article entitled “The Changing Shape of Cinema: The History of Aspect Ratio.” Apparently the first standard image size was developed in the 1890s for the Kinetescope by Thomas Edison’s staff photographer.

“We owe the first aspect ratio to one man: William Kennedy Dickson. … Using 35mm film Dickson settled on an image that was 4 perforations high — resulting in an image that was .95” by .735” — a 4:3 aspect ratio — or 1.33”
— Filmmaker IQ

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