Engineering Calculators
CCTV Lens & FOV Calculator
Precision optical sizing tool for security integrators. Calculate focal length, horizontal angle of view, and EN 62676-4 DORI detection ranges.
CCTV Camera Lens & Field of View (FOV) Calculator
Compute focal length, horizontal coverage, and DORI EN 62676-4 recognition zones for Axis, Dahua, Hikvision, and Hanwha cameras.
Most widely deployed sensor for modern 1080p, 4MP and low-light cameras.
Engineering Recommendation
12 mm
Exact: 11.1 mm192 PPM
Recognition Grade10.0m × 5.6m
28.1° / 16.0°
Live 2D Field of View & Coverage Cone
Top-Down Plan ViewDORI Standard (EN 62676-4) Operational Distance Matrix
Maximum operational distance for identification, facial recognition, clothing observation, and intruder detection at selected resolution.
| Standard Level | Min Density | Max Distance | Operational Purpose |
|---|---|---|---|
| Identification | 250 px/m | 15.4 meters | Enables positive identification of an individual beyond reasonable doubt (court-grade facial detail). |
| Recognition | 125 px/m | 30.7 metersAchieved | Allows operators to verify with high certainty whether an individual matches someone seen previously. |
| Observation | 62.5 px/m | 61.4 metersAchieved | Allows general observation of characteristic details such as clothing, vehicle colors and movement. |
| Detection | 25 px/m | 153.6 metersAchieved | Enables reliable detection of a human figure moving within the camera field of view. |
For Security Industry Regulatory Agency (SIRA) submissions in Dubai and GCC municipal security tenders, facial identification cameras mounted at entry turnstiles and teller positions must deliver at least 250 Pixels Per Meter (PPM). For perimeter monitoring, a minimum of 62.5 PPM (Observation) is required.