Depth of Field for the OM System OM-1 II
OM System OM-1 II depth of field, computed from its exact 17.4×13.0 mm sensor, 20 MP resolution and 0.0145 mm circle of confusion — the numbers its own calculators use, not a generic preset. Matching the field of view of a 50 mm lens on full frame takes only 25 mm here, and at that matched framing an f/2.8 lens gives the same depth of field as f/5.6 on full frame.
🎯 Open the interactive calculator with this camera →
OM System OM-1 II key specs: 20 MP · 1.99× crop factor · 3.36 µm pixels · CoC 0.0145 mm (standard diagonal ÷ 1500). The depth-of-field values below assume focus at 5 m.
Sensor profile: what the OM System OM-1 II sensor means for depth of field
A 2× crop gives the deepest depth of field per framing of any interchangeable-lens format here, which is why it is popular for macro and handheld landscape — the sharp zone starts sooner.
| Property | Value | What it changes |
|---|---|---|
| Sensor size | 17.4 × 13.0 mm | Micro 4/3 — 26% of a full-frame sensor's area |
| Crop factor | 1.99× | a Micro 4/3 sensor records 1.99× the focal length, so a 50 mm lens frames like 100 mm on full frame |
| Native resolution | 20 MP (5184 × 3888) | prints 17.3 × 13.0 in at 300 ppi |
| Pixel pitch | 3.36 µm | how much sensor area each pixel gets — the smaller the pitch, the sooner diffraction bites |
| Circle of confusion | 0.0145 mm | the sharpness yardstick this page's depth-of-field numbers are built on (sensor diagonal ÷ 1500) |
| Diffraction limit | ≈ f/5.0 | past this aperture the airy disc outgrows a pixel pair and resolution falls, even though depth of field keeps growing |
Framing on the OM System OM-1 II: focal length vs angle of view
Because this is a 1.99× sensor, focal lengths land differently than on full frame. Horizontal angle of view below is computed from the sensor's exact 17.4 mm width.
| Focal length | Horizontal angle of view | 35 mm equivalent | Full-frame angle for that equivalent |
|---|---|---|---|
| 16 mm | 57.1° | 32 mm | 96.7° |
| 24 mm | 39.9° | 48 mm | 73.7° |
| 35 mm | 27.9° | 70 mm | 54.4° |
| 50 mm | 19.7° | 100 mm | 39.6° |
| 85 mm | 11.7° | 169 mm | 23.9° |
How the OM System OM-1 II compares to other Micro 4/3 bodies
| Body | Sensor area | Resolution | Pixel pitch | Diffraction limit |
|---|---|---|---|---|
| OM System OM-1 II | 226 mm² | 20 MP | 3.36 µm | ≈ f/5.0 |
| OM System OM-5 | 225 mm² | 20 MP | 3.34 µm | ≈ f/5.0 |
| Panasonic Lumix G9 II | 225 mm² | 25 MP | 3.00 µm | ≈ f/4.5 |
| Panasonic Lumix GH7 | 225 mm² | 25 MP | 3.00 µm | ≈ f/4.5 |
All values computed from the same sensor database the calculators use. Datasheet dimensions vary by a tenth of a millimetre between sources; the relative ordering here is what matters.
Near limit – far limit at 5 m focus
| Focal length | f/1.8 | f/2.8 | f/4 | f/8 | Hyperfocal @ f/8 |
|---|---|---|---|---|---|
| 16 mm | 3.32 m – 10.1 m | 2.80 m – 23.5 m | 2.22 m – ∞ | 1.11 m – ∞ | 2.23 m |
| 24 mm | 4.08 m – 6.45 m | 3.70 m – 7.69 m | 3.34 m – 9.98 m | 2.50 m – ∞ | 5.00 m |
| 35 mm | 4.52 m – 5.59 m | 4.30 m – 5.98 m | 4.05 m – 6.53 m | 3.41 m – 9.40 m | 10.6 m |
| 50 mm | 4.75 m – 5.27 m | 4.63 m – 5.44 m | 4.49 m – 5.65 m | 4.07 m – 6.48 m | 21.6 m |
| 85 mm | 4.91 m – 5.09 m | 4.87 m – 5.14 m | 4.81 m – 5.20 m | 4.64 m – 5.43 m | 62.5 m |
| 135 mm | 4.97 m – 5.04 m | 4.95 m – 5.05 m | 4.92 m – 5.08 m | 4.85 m – 5.16 m | 157.5 m |
| 200 mm | 4.98 m – 5.02 m | 4.98 m – 5.02 m | 4.97 m – 5.03 m | 4.93 m – 5.07 m | 345.5 m |
How to use this page
Find your lens and aperture, read the near–far range, and compose inside it — or open the interactive calculator to drag the focus distance live. On the OM System OM-1 II the practical ceiling is about f/5.0: stopping down past that deepens the sharp zone but starts costing detail to diffraction, so lean on the hyperfocal column instead of the smallest aperture on the dial. For the formula and the circle-of-confusion convention behind these numbers, see the circle of confusion guide.
Other OM System cameras
Frequently asked questions
What is the diffraction limit of the OM System OM-1 II?
About f/5.0. At a 3.36 µm effective pixel pitch there comes a point where the airy disc from an ever-smaller aperture covers more than a pixel can resolve, so sharpness stops improving. That is the number to stop at, not f/16 or f/22.
What is the circle of confusion for the OM System OM-1 II?
0.014 mm — the standard sensor diagonal ÷ 1500 convention, applied to the OM System OM-1 II's exact sensor.
What is the hyperfocal distance for a 50 mm lens on the OM System OM-1 II?
About 21.6 m at f/8 — focus there and everything from 10.8 m to infinity is acceptably sharp.
Does the OM System OM-1 II have a crop factor?
1.99× — a 50 mm lens frames like a 100 mm lens on full frame. See the crop factor guide.