Camera Lens & Field of View Calculator
Enter the camera's sensor, lens and target distance to get the field of view, scene width and pixel density — plus the DORI ranges (detect, observe, recognise, identify) for spec'ing jobs.
Inputs
Results
Horizontal field of view
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Scene width at target
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Pixel density at target
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| DORI level | Needs | Max distance |
|---|---|---|
| Identify | 250 px/m | — |
| Recognise | 125 px/m | — |
| Observe | 62.5 px/m | — |
| Detect | 25 px/m | — |
DORI levels per IEC EN 62676-4: Identify 250 px/m, Recognise 125 px/m, Observe 62.5 px/m, Detect 25 px/m. Real-world performance also depends on lighting, WDR, compression, motion blur and lens quality — treat results as a design guide, and confirm critical identification views on site.