Aspect Ratio
| Image Aspect Ratios | ||||
|---|---|---|---|---|
| Percentage | Ratio | Ratio | Factor | Notes |
| 100 | 1:1 | 1:1 | 1×1 | Square, Instagram, 6×6 medium format (120 film) |
| 117 | 1.166:1 | 7:6 | 7×6 | 6×7cm medium format (120 film) |
| 120 | 1.2:1 | 6:5 | 6×5 | 20×24" large format |
| 122 | 1.222:1 | 11:9 | 11×9 | Video conferencing CIF (352×288), 4CIF (704×576), 16CIF (1408×1152) |
| 125 | 1.25:1 | 5:4 | 5×4 | 4×5" print, 8×10" print, 4×5" large format (Ansel Adams), 8×10" large format, press camera (typical U.S.), SXGA (1280×1024) |
| 127 | 1.27:1 | 14:11 | 14×11 | 11×14" print, 11×14" large format |
| 133 | 1.33:1 | 4:3 | 4×3 | Eyesight, 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 |
| 137 | 1.375:1 | 11:8 | 11×8 | Academy, Academy 4K (3656×2664), IMAX (5616×4096) |
| 140 | 1.4:1 | 7:5 | 5×7 | 5×7" print, 5×7" large format |
| 141 | 1.414:1 | √2:1 | Paper | |
| 143 | 1.43:1 | 10:7 | 10×7 | IMAX |
| 150 | 1.5:1 | 3:2 | 3×2 | 35mm photos, APS-C, 4×6" print, 6×9cm medium format (120 film), DVGA and iPhone 4 (960×640) |
| 160 | 1.6:1 | 16:10 | 16×10 | 5×8" large format, 1024×640 laptop (1280×800), (1680×105) |
| 162 | 1.618:1 | (1+√5)/2:1 | Φ | Golden ratio (golden section, golden mean, divine proportion) |
| 167 | 1.666:1 | 5:3 | 5×3 | 12×20" view camera, W×GA (1280×768), Super 16mm (15:9) |
| 170 | 1.7066:1 | 128:75 | 1024×600 (128:75) | |
| 178 | 1.777:1 | 16:9 | 16×9 | HDTV, 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) |
| 185 | 1.85:1 | 37:20 | Cinema flat | |
| 189 | 1.888:1 | 17:10 | 2K (2048×1080) | |
| 190 | 1.9:1 | 256:135 | Digital Cinema Initiatives 4k native (4096×2160) | |
| 194 | 1.94:1 | 768:395 | 6K (6144×3160) | |
| 200 | 2:1 | 2:1 | 2×1 | 40×80" large format, 6×12cm medium format |
| 220 | 2.2:1 | 11:5 | Todd-AO | |
| 237 | 2.37:1 | 21:9 | 2560×1080 | |
| 239 | 2.39:1 | Cinema (also known as 240 — 2-4-0) | ||
| 240 | 2.4:1 | 12:5 | 5×12 | 5×12" view camera |
| 243 | 2.428:1 | 17:7 | 7×17 | 7×17" view camera |
| 250 | 2.5:1 | 5:2 | 2×5 | 4×10" view camera, 8×20" large format view camera |
| 267 | 2.67:1 | 8:3 | 3×8 | Cinemascope |
| 283 | 2.833:1 | 17:6 | 6×17 | 6×17cm panoramic medium format (120 film) |
| 300 | 3:1 | 3:1 | 3×1 | Panoramic, APS-P, Red Epic 617 (28000×9334) |
From 35mm to 16:9 — a history of aspect ratio
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