Front-to-back sharpness for a 20 mm lens on APS-C (Canon): focus at the hyperfocal distance and everything from half that distance to infinity is acceptably sharp.
The chart lists every aperture in meters and feet; the calculator above it is preset to these values so you can try other settings.
Hyperfocal distance chart: 20 mm on APS-C (Canon)
| Aperture | Hyperfocal (m) | Hyperfocal (ft) | Sharp from (m) | Sharp from (ft) |
|---|---|---|---|---|
| f/1.4 | 15.06 m | 49.4 ft | 7.53 m | 24.7 ft |
| f/1.8 | 11.72 m | 38.4 ft | 5.86 m | 19.2 ft |
| f/2 | 10.55 m | 34.6 ft | 5.27 m | 17.3 ft |
| f/2.8 | 7.54 m | 24.7 ft | 3.77 m | 12.4 ft |
| f/4 | 5.28 m | 17.3 ft | 2.64 m | 8.7 ft |
| f/5.6 | 3.78 m | 12.4 ft | 1.89 m | 6.2 ft |
| f/8 | 2.65 m | 8.7 ft | 1.33 m | 4.3 ft |
| f/11 | 1.93 m | 6.3 ft | 0.97 m | 3.2 ft |
| f/16 | 1.34 m | 4.4 ft | 0.67 m | 2.2 ft |
| f/22 | 0.98 m | 3.2 ft | 0.49 m | 1.6 ft |
Circle of confusion 0.019 mm. A 20 mm lens on this sensor frames like 32 mm on full frame.
Other focal lengths
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