Lens calculator
Which lens covers your area — and will faces be clear?
Enter how far the camera is from the area and how wide it is. We work out the lens and the pixel density at that distance.
Recommended lens
9.3 mmExact focal length (33° view)
427 px/mDetail across the area: Identify
8 mm fixed lens (or 2.8-12 mm varifocal)What to fit
Recognise a person's identity beyond reasonable doubt.
Standard lenses at this distance
| Lens | View | Covers | Detail |
|---|---|---|---|
| 2.8 mm | 90° | 20.0 m wide | 128 px/m Recognise |
| 3.6 mm | 76° | 15.6 m wide | 165 px/m Recognise |
| 4 mm | 70° | 14.0 m wide | 183 px/m Recognise |
| 6 mm | 50° | 9.3 m wide | 274 px/m Identify |
| 8 mm | 39° | 7.0 m wide | 366 px/m Identify |
| 12 mm | 26° | 4.7 m wide | 549 px/m Identify |
Detail levels follow IEC 62676-4 (DORI): Identify ≥ 250 px/m, Recognise ≥ 125, Observe ≥ 62, Detect ≥ 25. Sensor widths are approximate; lighting and focus also affect real detail.
