How to choose the right focal length lens for Omada cameras

Contents

Objective

Introduction

Reference for Len Selection

How to Choose the Right Focal Length for Your Scene

Objective

This article explains the differences between common camera lens sizes and helps you choose the most suitable lens for your specific surveillance scenario.

Introduction

Lens focal length determines two key factors: the angle of view (how much of the scene is visible) and magnification (how large objects appear). A longer focal length results in a narrower angle of view and higher magnification.

Reference for Len Selection

Refer to the chart below to understand how focal length affects the field of view and coverage distance.

• Shorter focal lengths (e.g., 2.8 mm, 4 mm) offer a wider angle of view but cover shorter distances.
• Longer focal lengths (e.g., 6 mm, 8 mm) provide a narrower angle of view but allow you to monitor objects farther away.

Use this visual guide to select the lens that best fits your surveillance requirements based on the desired coverage area and distance.

How to Choose the Right Focal Length for Your Scene

When selecting the focal length of an camera lens, consider the following common scenarios and recommendations:

• Entrances, Lobbies, and Wide Indoor Areas: Use a short focal length lens (e.g., 2.8 mm or 4 mm) to achieve a wide viewing angle and cover large areas at short range.

• Hallways and Corridors: A 4 mm or 6 mm lens works well for monitoring linear spaces, providing a balance between coverage and detail.

• Parking Lots, Perimeters, or Outdoor Spaces: For long-distance monitoring or focusing on distant targets, choose a longer focal length (e.g., 6 mm or 8 mm) to capture greater detail at range.

• Access Points, Cash Registers, or Areas Requiring Detail: Use a higher focal length lens (e.g., 6 mm or 8 mm) if you need to clearly identify faces, license plates, or small objects at a distance.

• General Surveillance: For overall awareness in medium-sized rooms or mixed-use spaces, a 4 mm lens often provides the best compromise between field of view and detail.

Select your lens focal length according to the specific monitoring environment and the level of detail you need. If unsure, refer to field-of-view diagrams or manufacturer’s sample images to help visualize the coverage for each lens type.

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