Depth of field for the Pentax HD PENTAX-D FA 21mm F2.4 ED Limited DC WR on the Pentax K-1 (1.00× crop, circle of confusion 0.030 mm). At 21 mm and f/8 the hyperfocal distance is 1.9 m — focus there and everything from 0.9 m to infinity is sharp.
Focal length
21 mm
21 mm FF equiv.
Hyperfocal @ f/8
1.9 m
6 ft
NPF wide open
11.0 s
f/2.4, 4.87 µm pixels
Horizontal FOV
81.2°
Depth of field chart at 21 mm
| Focus distance | f/2.8 | f/4 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|---|
| 1 m | 0.84–1.2 m | 0.79–1.4 m | 0.73–1.6 m | 0.65–2.1 m | 0.58–3.7 m | 0.48–∞ m |
| 2 m | 1.45–3.2 m | 1.30–4.3 m | 1.14–8.1 m | 0.96–∞ m | 0.81–∞ m | 0.63–∞ m |
| 3 m | 1.91–6.9 m | 1.66–15.8 m | 1.41–∞ m | 1.14–∞ m | 0.93–∞ m | 0.71–∞ m |
| 5 m | 2.57–96.9 m | 2.12–∞ m | 1.73–∞ m | 1.35–∞ m | 1.06–∞ m | 0.78–∞ m |
| 10 m | 3.45–∞ m | 2.69–∞ m | 2.08–∞ m | 1.56–∞ m | 1.18–∞ m | 0.84–∞ m |
| 20 m | 4.16–∞ m | 3.11–∞ m | 2.32–∞ m | 1.68–∞ m | 1.25–∞ m | 0.88–∞ m |
Each cell shows the near and far limits of acceptable sharpness.
Open the DoF calculator with this setup