2.40 m
Hyperfocal distance
1.20 m
Sharp from (focused at hyperfocal)
20 mm f/5.6
Full-frame equivalent
94°
Diagonal angle of view
Depth of field by subject distance#
20 mm at f/5.6 on full frame (36×24 mm), circle of confusion 30 µm. “Background blur” is the size of an out-of-focus light at infinity as a percentage of frame width.
| Focus distance | Near limit | Far limit | Total DoF | Front / behind | Background blur |
|---|---|---|---|---|---|
| 30.0 cm (0.98 ft) | 26.8 cm | 34.0 cm | 7.2 cm | 44% / 56% | 0.71% |
| 50.0 cm (1.64 ft) | 41.6 cm | 62.6 cm | 21.0 cm | 40% / 60% | 0.41% |
| 75.0 cm (2.46 ft) | 57.4 cm | 1.08 m | 50.8 cm | 35% / 65% | 0.27% |
| 1.00 m (3.28 ft) | 70.8 cm | 1.70 m | 99.1 cm | 29% / 71% | 0.20% |
| 1.50 m (4.92 ft) | 92.5 cm | 3.96 m | 3.04 m | 19% / 81% | 0.13% |
| 2.00 m (6.56 ft) | 1.09 m | 11.9 m | 10.8 m | 8% / 92% | 0.10% |
| 3.00 m (9.84 ft) | 1.33 m | ∞ | ∞ | — | 0.07% |
| 4.00 m (13.1 ft) | 1.50 m | ∞ | ∞ | — | 0.05% |
| 5.00 m (16.4 ft) | 1.62 m | ∞ | ∞ | — | 0.04% |
| 7.00 m (23.0 ft) | 1.78 m | ∞ | ∞ | — | 0.03% |
| 10.0 m (32.8 ft) | 1.93 m | ∞ | ∞ | — | 0.02% |
| 15.0 m (49.2 ft) | 2.06 m | ∞ | ∞ | — | 0.01% |
| 20.0 m (65.6 ft) | 2.13 m | ∞ | ∞ | — | 0.01% |
| 30.0 m (98.4 ft) | 2.21 m | ∞ | ∞ | — | 0.01% |
| 50.0 m (164 ft) | 2.27 m | ∞ | ∞ | — | 0.00% |
| 100 m (328 ft) | 2.33 m | ∞ | ∞ | — | 0.00% |
Try other settings#
Near limit—
Far limit—
Depth of field—
Hyperfocal distance—
In front / behind—
20 mm at other apertures (subject at 3 m)#
Other focal lengths at f/5.6#
Same lens settings on other formats#
When to use it#
At f/5.6, a 20 mm lens on full frame is a natural choice for general photography. Focused at 3 m you get everything to infinity; for maximum front-to-back sharpness focus at 2.40 m and everything from 1.20 m to infinity will be acceptably sharp.
See also the f/5.6 aperture guide.
Frequently asked questions#
What is the depth of field of a 20mm lens at f/5.6?
On full frame, focused at 3 m, it is infinite (beyond the hyperfocal distance); at 1 m it is 99.1 cm.
What is the hyperfocal distance for 20mm f/5.6?
2.40 m (7.88 ft) on full frame. Everything from 1.20 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources