FOV to focal length calculator

Before setting up your security camera, it’s important to consider a few key factors to make sure you're capturing the right angle for your needs. Whether you're monitoring a wide outdoor area or a narrow hallway, understanding your camera’s Field of View (FOV) will make all the difference in getting clear, useful footage.

If you’re still not sure which lens or field of view is best for your needs, don’t worry—that’s what we’re here for. At BrickHouse Security, we test all of our products to make sure they work for real-world applications. Feel free to reach out, and we’ll help you figure out the best setup to secure your property effectively.

Field of view

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On the other hand, if you're looking to capture specific details, like license plates or facial features, a narrow-angle camera with a telephoto lens is the better option. These cameras are ideal for entrances or areas where identifying specific people or objects is critical.

The focal length of the lens also affects the FOV. In short, a shorter focal length (like 10mm) means a wider view but less detail. A longer focal length (like 160mm) narrows the view but increases the detail.

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Todd Morris is the Founder and CEO of BrickHouse Security, a leader in GPS tracking and security solutions since 2005. Featured on the Inc 5000 list, Todd has steered the company from its inception, applying expertise developed at Apple, Adobe, and MapQuest to deliver innovative, reliable solutions for both businesses and consumers. Recognized as an authority in the GPS tracking industry, Todd regularly contributes insights to major news programs. His practical approach includes using his sons as beta testers for products, from stroller tours to monitoring teenage driving, ensuring BrickHouse’s offerings are user-friendly and effective. This hands-on testing reflects Todd’s commitment to real-world application and safety.

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Your FOV is determined by the lens you choose, and it’s crucial to match the lens to the specific needs of your space. For example:

FOV to focal length

Simply put, the FOV refers to the area a security camera can capture or "see." Measured in degrees, this tells you how much of a scene will appear in the camera's frame.

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The FOV helps you decide what kind of camera you need. Do you need to capture a large area, like a parking lot, or focus on a smaller space, like a hallway or entry point? Choosing the right FOV ensures you're getting the footage you need, whether it's a broad overview or fine details.

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A camera with a wide-angle lens is perfect for monitoring large areas but sacrifices detail. These cameras work well for spotting general movement or activity in open spaces like parking lots or lobbies.

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When you're thinking about installing a best security camera, understanding some basic concepts can go a long way in helping you make the right choice. One of the most critical aspects of camera performance is the field of view (FOV).

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Some people use "field of view" and "angle of view" interchangeably, but there is a subtle difference. In general, the FOV is the broader term that refers to the entire area visible to the camera, while angle of view is more about the specific angular measurement based on the lens. For practical purposes, though, you can treat them the same when considering a security camera.