Key numbers
- Mount / system: Micro Four Thirds
- Sensor: Micro Four Thirds, 17.3 × 13mm
- Focal length: 25mm (about 50mm full-frame equivalent, 2.00× crop)
- Aperture: f/1.8 to f/22
- DoF at 3 m, 25mm, f/1.8: 2.67–3.42 m (≈ 75 cm deep)
- Hyperfocal distance (25mm, f/8): 5.44 m
Depth of field table
Distances are measured from the sensor plane. Each cell shows the near and far limit of acceptable sharpness in metres (∞ = to infinity). Circle of confusion = sensor diagonal / 1500.
| Aperture | Hyperfocal | 1 m | 2 m | 3 m | 5 m | 10 m |
|---|---|---|---|---|---|---|
| f/1.8 | 24.1 m | 0.96–1.04 | 1.85–2.18 | 2.67–3.42 | 4.14–6.30 | 7.07–17.1 |
| f/2 | 21.7 m | 0.96–1.05 | 1.83–2.20 | 2.64–3.48 | 4.07–6.49 | 6.85–18.5 |
| f/2.8 | 15.5 m | 0.94–1.07 | 1.77–2.29 | 2.52–3.71 | 3.78–7.36 | 6.08–28.1 |
| f/4 | 10.9 m | 0.92–1.10 | 1.69–2.44 | 2.35–4.13 | 3.43–9.23 | 5.21–123 |
| f/5.6 | 7.76 m | 0.89–1.14 | 1.59–2.68 | 2.17–4.86 | 3.05–13.9 | 4.38–∞ |
| f/8 | 5.44 m | 0.85–1.22 | 1.47–3.14 | 1.94–6.62 | 2.61–58.5 | 3.53–∞ |
| f/11 | 3.96 m | 0.80–1.33 | 1.33–3.99 | 1.71–12.0 | 2.22–∞ | 2.84–∞ |
| f/16 | 2.73 m | 0.74–1.55 | 1.16–7.21 | 1.44–∞ | 1.77–∞ | 2.15–∞ |
| f/22 | 1.99 m | 0.67–1.96 | 1.00–∞ | 1.20–∞ | 1.43–∞ | 1.67–∞ |
FAQ
What is the depth of field of the Olympus M.Zuiko 25mm F1.8 at f/1.8 and 3 m?
At 25mm, f/1.8 and focus at 3 m, acceptable sharpness runs from 2.67 to 3.42 m — about 75 cm in total.
What is the hyperfocal distance of the Olympus M.Zuiko 25mm F1.8?
At 25mm and f/8 on a Micro Four Thirds sensor the hyperfocal distance is about 5.44 m. Focus there and everything from 2.72 m to infinity is sharp.
How do I get more background blur with the Olympus M.Zuiko 25mm F1.8?
Open the aperture to f/1.8, move closer to your subject and increase the distance between subject and background. You can check the result in the calculator above.