Lens & Field of View Visualizer

Visualize camera coverage and determine optimal lens selection for LPR, face recognition, and general surveillance.

Camera Configuration

Field of View Visualization

Did You Know?

For License Plate Recognition (LPR), the plate must occupy at least 100 pixels width in the image. For face recognition, you need minimum 80 pixels between the eyes. Use this tool to calculate if your lens and distance combination will achieve these requirements. ARSA's Traffic Monitor and Access Control solutions are optimized for these detection scenarios.

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How to Use This Tool

Select Lens

Choose your camera's lens focal length. Smaller values give wider views, larger values zoom in.

Set Distance

Enter the distance from camera to your target area in meters.

Choose Sensor

Select your camera's sensor size. Larger sensors provide wider field of view.

View Results

See coverage area, detection zones, and whether your setup supports LPR or face recognition.

Benefits

Visual Planning

See exactly what your camera will capture before installation.

Optimal Lens Selection

Find the right lens for your specific coverage requirements.

Detection Verification

Confirm your setup meets LPR and face recognition requirements.

Avoid Blind Spots

Identify dead zones and ensure complete coverage of your area.

Frequently Asked Questions

What lens do I need for license plate recognition?

For LPR, the license plate must be at least 100 pixels wide in the captured image. Use this calculator with your target distance to find the appropriate lens. For a typical parking lot at 10m distance, a 12mm lens on a 1080p camera works well. For highway applications at 25m+, you may need 25-50mm lenses.

How far can a 4mm lens see?

A 4mm lens can technically "see" very far, but the useful range depends on what you need to identify. For general detection, a 4mm lens on a 1080p camera is effective up to 15-20m. For identification (recognizing faces or plates), it's limited to about 3-5m. Use this calculator to verify your specific requirements.

What is the dead zone in CCTV?

The dead zone is the area directly below/in front of the camera where the lens cannot focus properly. This is typically within 0.5-1m for most lenses. The visualization shows this area in red. Position cameras to ensure the dead zone doesn't cover critical areas you need to monitor.

How do I calculate camera field of view?

Field of view is calculated using: FoV = 2 * arctan(sensor_size / (2 * focal_length)). Our calculator does this automatically. Simply enter your lens focal length and sensor size to get both horizontal and vertical field of view angles.

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