Camera Lens & Field of View Calculator
Pick a sensor, lens and resolution, then drag the distance slider. The 3D scene shows the camera's field of view and DORI zones, and the simulated camera view shows roughly what a face and number plate would look like at that distance.
Drag to orbit · scroll to zoom
3D view unavailable (couldn't load the 3D library). The calculator below still works.
Identify (250 px/m)
Recognise (125 px/m)
Observe (62.5 px/m)
Detect (25 px/m)
Person & car at target distance
Camera setup
Simulated camera view
Face at 10 m · — px tall
Plate at 10 m · — px wide
Simulation shows pixel density only — real footage is also affected by lighting, motion blur, compression and IR at night.
Results
Horizontal field of view
—
Scene width at target
—
Pixel density at target
—
| 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.