Field of View Calculator

Calculate your security camera's coverage area based on lens focal length, sensor size, and installation distance.

Lens Focal Length: 4mm

2.8mm16mm

Sensor Size

1/3" (4.8mm × 3.6mm)

Distance to Subject: 30 feet

5 ft200 ft

Installation Height: 10 ft

6 ft40 ft

Units

Horizontal FOV61.9°

Vertical FOV48.5°

Diagonal FOV73.7°

Scene Width36 feet

Scene Height27 feet

Camera Angle18° down

Wide Angle

Good balance of coverage and detail

Wide enough to see full doorway, detailed enough to identify faces

Maximum coverage for large outdoor areas

Narrow field of view perfect for long corridors

Focused view for register and transaction areas

• Shorter focal lengths (2.8mm) provide wider coverage but less detail at distance
• Longer focal lengths (8mm+) provide more detail but narrower coverage
• Larger sensors provide wider field of view at the same focal length
• Higher installation heights increase the downward viewing angle
• Consider combining different lens types for comprehensive coverage
• Use wide-angle lenses for entrances and narrow lenses for long hallways

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