Depth of field for the OM 20mm F1.4 on the OM System OM-1 (2.00× crop, circle of confusion 0.015 mm). At 20 mm and f/8 the hyperfocal distance is 3.4 m — focus there and everything from 1.7 m to infinity is sharp.
Focal length
20 mm
40 mm FF equiv.
Hyperfocal @ f/8
3.4 m
11 ft
NPF wide open
7.4 s
f/1.4, 3.32 µm pixels
Horizontal FOV
48.5°
Depth of field chart at 20 mm
| Focus distance | f/1.4 | f/2 | f/2.8 | f/4 | f/5.6 | f/8 |
|---|---|---|---|---|---|---|
| 1 m | 0.95–1.1 m | 0.93–1.1 m | 0.91–1.1 m | 0.87–1.2 m | 0.83–1.3 m | 0.77–1.4 m |
| 2 m | 1.81–2.2 m | 1.74–2.3 m | 1.66–2.5 m | 1.54–2.8 m | 1.41–3.4 m | 1.25–4.9 m |
| 3 m | 2.59–3.6 m | 2.45–3.9 m | 2.29–4.4 m | 2.07–5.4 m | 1.85–8.0 m | 1.58–28.3 m |
| 5 m | 3.96–6.8 m | 3.64–8.0 m | 3.28–10.5 m | 2.86–19.8 m | 2.44–∞ m | 2.00–∞ m |
| 10 m | 6.56–21.0 m | 5.72–39.8 m | 4.88–∞ m | 4.00–∞ m | 3.23–∞ m | 2.50–∞ m |
| 20 m | 9.76–∞ m | 8.00–∞ m | 6.46–∞ m | 5.00–∞ m | 3.85–∞ m | 2.86–∞ m |
Each cell shows the near and far limits of acceptable sharpness.
Open the DoF calculator with this setup